Abstract: In a transducer of at least one electrical input signal into two separate magnetic output signals for a pneumatic actuator, a pressure input is connected to a source of pressure and a setting unit sets the pneumatic output signals by use of the electrical input signal. The setting unit provides the two pneumatic output signals separately and reciprocal to each other as a function of the input signal. At least one of the two output signals is connected to a pneumatic amplifier.

Abstract: A single lever faucet with spray, wherein two cold and hot water inlet holes, a water outlet hole and a through hole are defined in the bottom of the faucet body, and the water outlet hole is connected to a hollow threaded tube, and the through hole is connected to a connecting tube. One side of the peripheral of the faucet body is defined with a chamber and a controlling device, and in the top surface of the faucet body is formed an inserting groove that is connected to the through hole for inserting a discharging base. A tee joint member is mounted between the hollow threaded tube and the connecting tube, a valve room is defined in the tee joint member for installing a diverter valve, and the middle section of the tee joint member is connected to the hollow threaded tube, and the ends are connected to a spray gun and a guiding tube respectively. Therefore, by opening and closing the spray gun, the water that supplied to the spray gun and the water outlet tube can be changed automatically.

Abstract: A fuel storage system for a transportation or recreational vehicle has a fuel tank that carries a vapor assembly that seeks out vapor pockets and controllably removes fuel vapor from the tank without releasing hydrocarbons to the surrounding environment. Preferably, a vent manifold attaches to a flange that sealably covers an access hole of the tank. At least one flexible tentacle extends from the manifold in the tank to a respective vapor vent valve that floats upon the surface of fuel at a vapor dome. When freely floating, the vent valve is open thus communicates the vapor dome through the tentacle and preferably with a filtering carbon canister. As fuel surface levels change or the vehicle tilts, changing the vapor dome size or location in the tank, the floating vapor vent valve is free to move generally with the vapor dome and as permitted by the flexibility of the trailing tentacle.

Abstract: A pilot valve actuator for use with a hydrant valve has a pilot valve and a removable actuator. The pilot valve blocks communication between a primary hydrant chamber and a piston chamber when in a closed position. Under pressure, the actuator opens the pilot valve against its biasing force permitting the flow of fluid between the hydrant chamber and the piston chamber. The pilot valve is permanently attached to the hydrant valve. The actuator is removable from the pilot valve by a quick disconnect mechanism permitting storage of the actuator remote from the hydrant valve.

Abstract: A portable tire pump includes a small refillable gas bottle and a control device connected to the gas bottle. The control device includes an inlet channel with one end connected to the connecting end, an outlet channel with one end connected to an air injecting tub, and an airflow controller connected with the other ends of the inlet and the outlet channels to conduct and control air flowing from the gas bottle to pump into a tire.

Abstract: A device for automatically maintaining a desired water level in a water structure, such as a pond, pool or decorative water fountain. The device includes a reserve tank that is connected to the water structure by an open tube, or pipe, thus allowing the water level in the reserve tank to be the same as the water level in the water structure. When the water level in the structure drops, so does the water level in the device. When the water level in the device drops below a pre-defined level, a water supply switch is activated and more water is added to the reserve tank. As water is added to the reserve tank, water also flows through the open tube into the water structure, and the water levels in the reserve tank and in the water structure both rise at similar rates. When the water level in the reserve tank reaches a pre-defined full level, the water supply switch is de-activated and the flow of water to the reserve tank, and to the water structure, is shut off.

Abstract: A fluid delivery system for delivering at least one service fluid to at least one construction type equipment. The fluid delivery system includes a modular body including a main platform with a variety of different sizes of fluid vessels and at least one pump associated therewith. The fluid delivery system further includes hoses to facilitate the transfer of the fluids to construction equipment and hoses to facilitate the transfer of used fluids from construction equipment. A containment component is integrally formed with the modular body so as to provide the retaining of the fluid reservoirs during transit. An optional additional platform containing additional fluid vessels is capable of being attached to the front portion of the main platform, thereby increasing the total fluid storage capacity.

Abstract: A hydraulic control apparatus for a vehicular fluid-actuated power transmitting device provided with a lock-up clutch and an oil cooler, the lock-up clutch being operable between an engaged state and a released state according to a difference between pressures of a working fluid in an engaging fluid chamber and a releasing fluid chamber, the oil cooler being connected to a fluid passage communicating with the engaging and releasing fluid chambers, and operable to cool the working fluid, the hydraulic control apparatus including an oil cooler by-pass valve operable to permit the working fluid to by-pass the oil cooler, and a low-temperature by-pass device operable to open the oil cooler by-pass valve, for permitting the working fluid to by-passes the oil cooler, when a temperature of the working fluid is lower than a predetermined lower limit.

Abstract: A method and apparatus for dispensing compressed gas to a receiving vessel is provided where the pressure ramp rate is varied as a function of apparent gas density in the receiving vessel. In a first portion of the dispensing process, the time-averaged pressure ramp rate is greater than during a later portion of the dispensing process.

Abstract: The multiple antisymmetric optimal (MAO) control algorithm is disclosed for a gas delivery system including a flow ratio controller for dividing a single mass flow into multiple flow lines. In the MAO control algorithm, each flow line is provided with a flow sensor and a valve actively controlled by a SISO feedback controller combined with a linear saturator to achieve the targeted flow ratio set point. For optimal control performance, these SISO controller and linear saturators are substantial identical. It is proved that each valve control command is multiple antisymmetric to the summation of all other valve control commands. Therefore, the MAO control algorithm guarantees that there exists at least one valve at the allowable maximum open position at any moment, which achieves the optimal solution in terms of the maximum total valve conductance for a given set of flow ratio set points.

Abstract: A liquid container includes: a liquid containing chamber that discharges a liquid stored therein by pressurization of a pressure unit; a liquid detection chamber that is connected to the liquid containing chamber, and the volume of which changes according to an inflow amount of the liquid from the liquid containing chamber; a detection unit for detecting a change of the volume of the liquid detection chamber; and a valve mechanism that is disposed between the liquid containing chamber and the liquid detection chamber and that can block an inflow of the liquid from the liquid containing chamber to the liquid detection chamber.

Abstract: A valve assembly comprising a valve body, a first movable pressure responsive element, and a second pressure responsive movable element, wherein the valve assembly further comprises a resilient biasing element and a movable third pressure responsive element, the resilient biasing element extending between the third pressure responsive element and the valve body and the third pressure responsive element being adapted to act on both the first and second pressure responsive elements to transmit the biasing force of the resilient biasing element to both the first and second pressure responsive elements.

Abstract: This invention comprises a purge valve comprising a valve body having a first primary loop port and a second primary loop port, the valve body defining a first secondary loop port and second secondary loop port, the valve body defining a flow channel and a valve portion, the valve portion in communication with the first, second, third, and forth port and a flow diversion device disposed within the valve portion, the flow diversion device configurable between a first and second position such that when the flow diversion device is in the first position the first primary loop port is in communication with the second primary loop port, the first secondary loop port and the second secondary loop port and when the flow diversion device is in a second position the first primary loop port is in communication with the first secondary loop port only and the second primary loop port is in communication with the second secondary loop port only.

Abstract: Apparatus and methods for operating a dual chamber orifice fitting. The dual chamber orifice fitting comprises a body having a lower chamber and a top having an upper chamber. An aperture connects the upper chamber to the lower chamber. A closure member is pivotally mounted to the fitting and pivots about a first axis between a first position and a second position. A pivot arm is rotatably mounted to the body and engages the closure member so that rotation of the pivot arm about a second axis pivots said closure member about the first axis between the first and second positions.

Abstract: The present invention relates to a three-dimensionally intersecting diverter as an inner member for a pipe, barrel or tower, which includes the body of a pipe, barrel or tower and one or more three-dimensionally intersecting diverters, said three-dimensionally intersecting diverter comprises an even number (13 4) of conical cavities arranged annularly, all of the conical cavities converge at the midpoint of the axis of the three-dimensionally intersecting diverter at the center of the three-dimensionally intersecting diverter; the intersection point of the axial lines of the odd numbered conical cavities and the intersection point of the axial lines of the even numbered conical cavities are located to both sides of the center of the three-dimensionally intersecting diverter respectively and symmetrically with each other.

Abstract: The invention relates to a flexible hose, in particular, a charge air hose, with at least three layers, whereby one layer is formed as a reinforcing layer and two layers comprise an elastomeric material, whereby one of the three layers contains acrylate rubber (ACM).

Abstract: Elongated members for use in orthopedic procedures for supporting or correcting tissue are disclosed. Embodiments include several sections, some of which are of differing diameters than others, and such sections may be generally rod-shaped or plate-shaped.

Abstract: A process, an arrangement and a gas supply station for filling high pressure gas containers include supplying a liquefied or solidified first gas (2) from a gas supply station (13) through a thermally isolated filling tube (14) with a moveable tube head (15) to the high pressure gas container (1); as well as a process of batch filling of high pressure gas containers (1) with gas, wherein multiple gas containers (1) are cooled in parallel, which are filled sequentially using the process. The invention allows for fast, economical, reliable, reproducible and precise filling of high pressure gas containers, wherein a number of the known conventional devices that are not particularly suited for high pressure respectively low temperature appliances may still be used.

Abstract: A container filling assembly includes a plurality of fluid storage containers, a fluid inlet for supplying a fluid to the containers, a vacuum source for creating a vacuum in the containers to draw the fluid into the containers, and a connective structure for connecting the vacuum source and the fluid source in fluid communication with the containers. Preferably, the container filling assembly is a sterile, closed system.

Abstract: A check valve for an air-packing device comprises upper and lower check valve films that are placed between upper and lower packing films that form the air-packing device contour. The check valve can be advantageously used for the air-packing device having a multiplicity of air containers. A common air duct that allows compressed air to flow into each air container through the check valve is formed between the upper and lower check valve films independently from other films such that the check valve can be placed flexibly in the air-packing device. Peeling agents are applied between the upper and lower check valve films to create the common air duct by preventing heat-sealing between the films.

Abstract: A check valve for an air-packing device comprises upper and lower check valve films that are placed between upper and lower packing films that form the air-packing device contour. The check valve can be advantageously used for the air-packing device having a multiplicity of air containers. A common air duct that allows compressed air to flow into each air container through the check valve is formed between the upper and lower check valve films independently from other films such that the check valve can be placed flexibly in the air-packing device. Peeling agents are applied between the upper and lower check valve films to create the common air duct by preventing heat-sealing between the films. Air passages are formed in each check valve between air guide seals and separation seals.

Abstract: A funnel having a receiving chamber, a neck portion, a valve and a couple connected to the neck portion, the coupler having a housing having an axial bore formed therethrough and a cam body received therein, the cam body having an axial bore formed there through, where the cam body cams the walls of the housing radially outward between a first diameter and a second diameter.

Abstract: A hood assembly for converting a surface planer between at least two operative modes for expelling chips removed from a workpiece being planed is provided. The hood assembly includes a manifold that is releasably attachable to the carriage assembly. The hood assembly also includes a hood door that is actuatable between at least two operative positions relative to the manifold, thereby providing at least two operative modes for expelling chips from the planer.

Abstract: A flux for soldering used when soldering is performed to a board subjected to electroless nickel plating, the flux containing resin having film forming ability, activator, and solvent, and further containing metallic salt in an amount of 0.1 to 20% by weight of the total amount of flux. The use of this flux suppresses diffusion of nickel solder in soldering portions, and prevents concentration of phosphorous, thereby improving the bonding strength of soldering.

Abstract: A precursor for manufacturing a Nb3Sn superconducting wire according to the present invention includes a mono-element wire including a Sn or Sn-based alloy core disposed at the, a Cu or Cu-based alloy matrix and a plurality of Nb or Nb-based alloy filaments surrounding the Sn or Sn-based alloy core, and a diffusion barrier layer and a stabilizing copper layer surrounding the Cu or Cu-based alloy matrix. In a final shape after a reduction process, the average diameter of the Nb or Nb-based alloy filaments is set to 5 ?m to 30 ?m, and the average distance between the Sn or Sn-based alloy core and the Nb or Nb-based alloy filaments nearest the Sn or Sn-based alloy core is set to 100 ?m or less.

Abstract: A Ni-free stainless steel product excellent in workability and corrosion resistance and a method for manufacturing such stainless steel product. A ferritic stainless steel product containing 18 to 24% by mass of Cr and 0 to 4% by mass of Mo is brought into contact with an inert gas containing a nitrogen gas at 800 degrees C. or above to subject it to nitrogen absorption treatment so that the product is austenitized partially or wholly to obtain such nickel-free product.

Abstract: The present invention provides improved cathodes and methods for producing such cathodes for ultimate use in conjunction with valve metal capacitors. The family of cathodes according to the present invention can be produced so that they inhabit a pre-existing metallic surface such as an inner surface of a titanium casing adjacent but insulated from direct electrical communication from an anode. Foil-type valve metal anodes as well as porous valve metal anodes formed from metallic powders may be used in conjunction with the cathodes of the present invention.

Abstract: Corrosion resistant coatings are formed on aluminum by contacting with aqueous solutions containing trivalent chromium ions and fluorometallate ions, the solutions being substantially free of hexavalent chromium. Trivalent chromium films formed on the aluminum surface when tested in 5% NaCl salt spray chamber showed corrosion resistance in excess of 168 hours. Trivalent chromium coated aluminum also serves as an effective base for paint primers.

Abstract: A piston ring having improved scuffing resistance, cracking resistance and fatigue resistance, consists of a high-chromium martensitic stainless steel and a sliding nitriding layer formed on the surface of said steel. The stainless steel consists of C: 0.3 to 1.0%; Cr: 14.0 to 21.0%, N: 0.05 to 0.50%, at least one of Mo, V, W and Nb: 0.03 to 3.0% in total, Si: 0.1 to 1.0%, Mn 0.1 to 1.0%, P: 0.05% or less, S: 0.05% or less, the balance being Fe and unavoidable impurities. The sliding nitriding layer comprises on its surface hard particles mainly consisting of nitrides in a range of from 0.2 to 2.0 ?m of average particle size, 7 ?m or less of the longest diameter, and from 5 to 30% in area ratio.

Abstract: Disclosed is a high-strength bolt having a tensile strength of 1,200 N/mm2 or more and superior in delayed fracture resistance and relaxation resistance, prepared by wire-drawing a bolt steel containing the following elements: C: 0.5 to 1.0% (mass %, the same shall apply hereinafter), Si: 0.55 to 3%, Mn: 0.2 to 2%, P: 0.03% or less (but not 0%), S: 0.03% or less (but not 0%), and Al: 0.3% or less (but not 0%), and containing proeutectoid ferrite, proeutectoid cementite, bainite and martensite at a total areal rate of less than 20% and pearlite in balance; cold-heading the wire into a bolt shape; and then bluing the bolt in a temperature range of 100 to 500° C.

Abstract: A hub ring and/or an outer ring constituting a bearing device for a wheel, which is formed of a steel which contains 0.45 to 0.70 mass % of C and at least one of V, Nb and Ti in a total amount of 0.3 mass % or less, wherein a micro structure of a part being not surface-hardening-treated contains a ferrite in 15 to 30 area % and contains a particulate ferrite.

Abstract: This invention relates to alloy powders suitable for thermal spraying or other cladding methods comprising an alloy of MCrAlM? wherein M is an element selected from nickel, cobalt, iron and mixtures thereof, and M? is an element selected from yttrium, zirconium, hafnium, ytterbium and mixtures thereof, and wherein M comprises from about 35 to about 80 weight percent of said alloy, Cr comprises from about 15 to about 45 weight percent of said alloy, Al comprises from about 5 to about 30 weight percent of said alloy, and M? comprises from about 0.01 to about 1.0 weight percent of said alloy, said alloy powder having a mean particle size of 50 percentile point in distribution of from about 5 microns to about 100 microns.

Abstract: Disclosed is an elementally mixed Al—Cu—Zn base powder blend for a sintered Al base alloy. The powder blend includes more than 5.6 wt % and less than 9 wt % Cu, 1˜5 wt % Zn, and a balance Al. With the powder blend, an article of a sintered Al base alloy having higher wear resistance as well as higher tensile strength can be fabricated.

Abstract: An aluminum alloy extrusion product having improved strength and fracture toughness, the aluminum base alloy comprised of 1.95 to 2.5 wt. % Cu, 1.9 to 2.5 wt. % Mg, 8.2 to 10 wt. % Zn, 0.05 to 0.25 wt. % Zr, max. 0.15 wt. % Si, max. 0.15 wt. % Fe, max. 0.1 wt. % Mn, the remainder aluminum and incidental elements and impurities.

Abstract: The present invention provides a heat resistant titanium alloy sheet excellent in cold workability having high temperature strength characteristics better than JIS Type 2 pure titanium and having a cold workability and high temperature oxidation resistance equal to or better than that of JIS Class 2 pure titanium and a method of production of the same, that is, a heat resistant titanium alloy sheet excellent in cold workability characterized by comprising, by mass %, 0.3 to 1.8% of Cu, 0.18% or less of oxygen, 0.30% or less of Fe, and, as needed, at least one of Sn, Zr, Mo, Nb, and Cr in a total of 0.3 to 1.5%, and the balance of Ti and less than 0.3% of impurity elements and, further, a method of production of that titanium alloy sheet characterized by performing the final annealing at 650 to 830° C. in temperature range or performing the hot-rolled sheet or coil annealing or intermediate annealing at 650 to 830° C. in temperature range and perform the final annealing after cold working at 600 to 650° C.

Abstract: A method of making a wrought aluminium-magnesium alloy rolled product, having a composition (in wt. %) of: 3.1<Mg<4.5; 0.4<Mn<0.85; 0.4<Zn<0.8; 0.06<Cu<0.35; 0.06<Cr<0.2; Fe<0.35; Si<0.2; Zr<0.05; Ti<0.3; impurities?0.05 each up to a total of max. 0.15, and balance aluminium.

Abstract: Biphasic alloys, formed through a spinodal decomposition process, are disclosed. The alloys have improved strength and hardness, over single phase alloys, due to coherency strain between the phases. They are prepared from readily available transition metals, and they can be used to make large, high-strength parts, for example, of types that cannot be made by extrusion, forging or cold working techniques.

Abstract: Disclosed is a heat-treated oxidizing agent for gas generating compositions which is obtained by mixing ammonium nitrate with an inorganic compound having as an element one or two or more metal atoms selected from the group consisting of Cu, Fe, Ni, Zn, Co, Mn and Ti and subjecting the mixture to heat treatment, and a gas generating composition containing the same. This invention provides a gas generating composition comprising ammonium nitrate, which can be safely produced, does not change in density with phase transition, and has sufficient combustibility.

Abstract: The present invention relates to a two piece pneumatic tire comprising a carcass and a removable tread belt disposed radially about the periphery of the carcass, the tread belt and carcass meeting at an interface between a radially outermost surface of the carcass and a radially innermost surface of the tread belt, wherein at least one of the radially outermost surface of the carcass and the radially innermost surface of the tread belt comprise a self lubricating rubber composition, the self lubricating rubber composition comprising at least one rubber and from 1 to 50 phr of at least one additive selected from alcohols of formula I, esters of formula II, or amides of formula III wherein R1 and R2 are independently selected from C12-C36 alkyl, C12-C36 alkenyl, or C12-C36 alkadienyl.

Abstract: A pneumatic tire has a carcass structure having at least one carcass ply and at least one annual reinforcing structure associated with the carcass ply, a tread band made of an elastomeric material at a radially outer position with respect to the carcass structure, a belt structure interposed between the carcass structure and the tread band and a pair of axially opposite side walls on the carcass structure, wherein the tread band has i) at least one first sector, radially extending, substantially of a first elastomeric material; ii) a plurality of second sectors radially extending, positioned at axially opposite sides of the at least one first sector and substantially of a second elastomeric material; iii) at least one longitudinal groove formed in the at least one first sector and extending substantially for the entire circumferential development of the tread band, wherein the first elastomeric material has a modulus of elasticity under compression at 23° C.

Abstract: Tire tread including a pattern formed by at two ridges of mean width L, which include a plurality of incisions whose traces on the contact surface extend between two points of intersection A and B, the segment AB making an angle with the transverse direction of the tread at most equal to 40°, the tread wherein each incision, of mean width E, includes a succession of incision portions, some of said incision portions having, on any surface parallel to the contact surface in the new condition and located between said surface in the new condition and ? of the maximum depth of the incision, traces that make an average angle ? at most equal to 15° with the longitudinal direction of the tread, said portions having a total length Lt which is at least equal to one-fifth of the ridge width; and in that the incision portions whose traces make an average angle ? are provided on their opposite walls with relief elements of amplitude K designed to cooperate with one another to block relative movements between one incision

Abstract: Assembly (10) including a wheel (12) and a tire (14), wherein the assembly comprises passive deflation means (20) for the tire (14). These means may be a porous zone of the tire or of the wheel, and may also comprise a deflation valve which is inactive below a predetermined pressure threshold.

Abstract: In producing a side-reinforced type runflat tire in which side reinforcing rubbers with generally crescent-shaped sections are interposed between a carcass and an inner liner, the first drums 11a, 11b on which the side-reinforcing rubbers are to be attached are so configured that their diameter do not substantially fluctuate along the axial direction. The expanding operation of the first drum, the mutually approaching operation of the first drums 11a, 11b, and the approaching operation of the bead gripping rings 30A are synchronized. As a result, there is provided a tire and a method of its production capable of being produced by a multi-size mixed flow production system consisting of minimum equipments and of preventing air inclusions and wrinkles between the carcass member 4A and the side-reinforcing rubber 2A.

Abstract: A method for affixing covering products to building structures is described. The covering product includes a thermoplastic membrane, a layer in which a fabric that includes an adhesive coating, and a release liner. The layer is affixed to a primary surface of the membrane. After the covering product is transported to the building structure, the release liner is removed, and the covering produce is adhered to the building structure.

Abstract: A method for producing a tyre for a vehicle wheel includes disposing a carcass structure on a drum having distal and proximal halves; disposing a belt structure around the carcass structure; moving the distal and proximal halves mutually close, from a building condition to a shaping condition, until an intermediate portion of the carcass structure contacts an inner surface of the belt structure; and transferring the drum, in the shaping condition, to a vicinity of at least one application unit. The distal and proximal halves are both carried by a support structure. During moving the distal and proximal halves mutually close, the proximal half maintains a fixed axial position with respect to the support structure. The at least one unit applies at least one elongated element of elastomeric material, in circumferential coils, to form at least one component of the tyre external to the carcass structure.

Abstract: The plant comprises a plurality of shuttles (10) each carrying at least one die part (110), the shuttles being conveyed in a moulding apparatus (20) which is provided with a plurality of punches and a corresponding plurality of seats (21) for holding the shuttles (10), the seats arranged to receive and release the shuttles (10),the moulding apparatus comprising means for inserting the punches into the die cavities (11, 12) of the shuttle and means for withdrawing the punches to achieve a compression moulding cycle for the article. The shuttles (10) are independent of the moulding apparatus. Each shuttles (10)comprises at least one circuit (15) for at least one conditioning fluid for controlling the temperature of the article located in the die, the moulding apparatus (20) comprising at least one feed system (25) for at least one conditioning fluid to feed the conditioning fluid to the shuttles (10) inserted in the seats (21) of the moulding apparatus (20).

Abstract: A web processing machine permitting inspection and repair of a roll of web material includes an inspection zone vertically juxtaposed to a splicing zone. The inspection zone is structured to be removed from the juxtaposed position to a retracted position in which the splicing zone is exposed to permit an operator to perform a modification of the web without having to substantially move physically from the position in which the operator was located to perform inspection while the machine is running.

Abstract: An apparatus comprising a fiber placement head assembly and an infrared heating assembly is provided. The fiber placement head assembly includes a compaction roller assembly and a feeder assembly. An infrared heating assembly, a cooling mechanism, temperature sensors, and a controller are operably coupled to the fiber placement head assembly. The infrared heating assembly includes an infrared heater that generates a heating profile. The heating profile defines a heating zone on either a tool or previously laid tows. If the burn point of either the tool or previously laid tows within the heating zone is approached, the controller, which receives temperature readings from the temperature sensors, simultaneously disables the infrared heater and activates the cooling mechanism. As such, the tool and the previously laid tows are protected from being ruined due to an over temperature condition.

Abstract: A stiffening device for a web destined to be wound in a log by a winding unit of a re-winding machine forms on the web at least one longitudinal strip of greater thickness, so as to obtain in the log at least one sector with a greater stiffness to avoid deformation of the log during winding.

Abstract: A method of making a polarizer includes providing a polyvinyl alcohol (PVA) film; dipping the PVA film into a dye solution for dyeing; dipping the PVA film into a first solution for pre-treatment; and dipping the pretreated PVA film into a second solution while stretching the PVA film. The first solution contains dicarboxylic acid and a catalyst for catalyzing the reaction between the dicarboxylic acid and the surface of the PVA film, and does not contain boric acid. The second solution contains boric acid.