Abstract: On the surface of a hydrogen-terminated diamond 1 formed by terminating a surface 2 of either a homoepitaxial diamond or a heteroepitaxial diamond or a surface-flattened polycrystal diamond are formed a drain-ohmic contact 4 and a source-ohmic contact 3 of gold or platinum, an insulating layer 5 formed of silicon oxide (SiO.sub.x : 1.ltoreq.X.ltoreq.2) and a gate electrode 6 mounted on said insulating layer, and the surface other than the element forming region is set to be an insulating region being non-hydrogen-terminated, for example, oxygen-terminated, and the elements formed on said region is being isolated.

Abstract: Electromagnetic waves are driven in the pipe to be inspected in the piping system by a transmitting antenna of a transmitter, to be propagated in the pipe; while a receiving antenna of a receiver is moved outside the pipe along the pipe, to receive leaking electromagnetic waves for inspecting elements of the piping system, and the location concerned of each element of the piping system to be inspected is detected in reference to the location of the receiving antenna where the level of electromagnetic waves received by the receiver becomes a peak. The locations to be inspected are the damaged portions such as holes formed by corrosion, cracks, etc. in the pipes, and the locations of joints, etc. It is also possible to move the transmitting antenna outside along the pipe, while arranging the receiving antenna at proper place in the pipe. Furthermore, it is also possible to move both the transmitting antenna and the receiving antenna in synchronization to effect the above inspection.

Abstract: Electromagnetic waves are driven in the pipe to be inspected in the piping system by a transmitting antenna of a transmitter, to be propagated in the pipe; while a receiving antenna of a receiver is moved outside the pipe along the pipe, to receive leaking electromagnetic waves for inspecting elements of the piping system, and the location concerned of each element of the piping system to be inspected is detected in reference to the location of the receiving antenna where the level of electromagnetic waves received by the receiver becomes a peak. The locations to be inspected are the damaged portions such as holes formed by corrosion, cracks, etc. in the pipes, and the locations of joints, etc. It is also possible to move the transmitting antenna outside along the pipe, while arranging the receiving antenna at proper place in the pipe. Furthermore, it is also possible to move both the transmitting antenna and the receiving antenna in synchronization to effect the above inspection.

Abstract: There is provided a double walled pipe having an inner pipe and an outer pipe which is movable relative to the inner pipe in a longitudinal direction of the inner pipe. Acting on only the outer pipe with a pipe jacking power makes it possible to bury the double walled pipe, without damaging the rear end of the inner pipe and also generating an internal stress on the inner pipe. Consequently, it is avoided such a situation that even in use pinholes, cracks, etc. occur on the inner pipe, and thus it is possible to expect an execution with higher reliability.

Abstract: Electromagnetic waves are driven in the pipe to be inspected in the piping system by a transmitting antenna of a transmitter, to be propagated in the pipe; while a receiving antenna of a receiver is moved outside the pipe along the pipe, to receive leaking electromagnetic waves for inspecting elements of the piping system, and the location concerned of each element of the piping system to be inspected is detected in reference to the location of the receiving antenna where the level of electromagnetic waves received by the receiver becomes a peak. The locations to be inspected are the damaged portions such as holes formed by corrosion, cracks, etc. in the pipes, and the locations of joints, etc. It is also possible to move the transmitting antenna outside along the pipe, while arranging the receiving antenna at proper place in the pipe. Furthermore, it is also possible to move both the transmitting antenna and the receiving antenna in synchronization to effect the above inspection.

Abstract: There is provided an adhesive composition for use as an adhesive agent for bonding a flexible lining tube on to the internal surface of an existing old pipe. Such an adhesive composition comprises: a) an epoxy resin; b) a thixotropy agent mainly containing silica fine particles; c) a lubricant mainly containing spheroidal fine particles; d) a curing agent having a sufficient compatibility with the thixotropy agent, and being used in a sufficient amount to cure the epoxy resin. In particular, the above components a),b),c) together form a main agent, and the above components b) and d) together form an auxiliary agent. Before use, the main agent and the auxiliary agent are separated from each other. When in use, the main agent and the auxiliary agent are mixed together, so as to form the adhesive composition for use as an adhesive agent for bonding a flexible lining tube on to the internal surface of the existing old pipe.

Abstract: Electromagnetic waves are driven in the pipe to be inspected in the piping system by a transmitting antenna of a transmitter, to be propagated in the pipe; while a receiving antenna of a receiver is moved outside the pipe along the pipe, to receive leaking electromagnetic waves for inspecting elements of the piping system, and the location concerned of each element of the piping system to be inspected is detected in reference to the location of the receiving antenna where the level of electromagnetic waves received by the receiver becomes a peak. The locations to be inspected are the damaged portions such as holes formed by corrosion, cracks, etc. in the pipes, and the locations of joints, etc. It is also possible to move the transmitting antenna outside along the pipe, while arranging the receiving antenna at proper place in the pipe. Furthermore, it is also possible to move both the transmitting antenna and the receiving antenna in synchronization to effect the above inspection.

Abstract: A method of repairing an existing pipeline including a main pipe and a branch pipe, includes the steps of introducing a first lining pig, a first batch of a resin, and some other pigs into the branch pipe and supplying a first batch of a liquid into the branch pipe until the first lining pig reaches a branching position; introducing a second lining pig, a second batch of a resin, and some other pigs into the main pipe and supplying a second batch of a liquid into the main pipe until the second lining pig reaches an inner end thereof; drawing back the second batch of the liquid out of the main pipe so as to cause the second batch of the resin to move back toward an open end of the main pipe, thereby forming a resin lining layer on the internal surface of the main pipe; drawing back the first batch of the liquid out of the branch pipe so as to cause the first batch of the resin to move back toward an open end of the branch pipe, thereby forming a resin lining layer on the internal surface of the branch pipe.

Abstract: Low conductivity cooling water for a fuel cell body is obtained by a water treatment apparatus which removes dissolved carbon dioxide gas in the exhaust gas condensate by a decarbonation column. Iron oxide is eliminated from the condensate as well as blowdown water by a MF membrane separator device. Iron ions are removed by a chelate resin column. Deionization occurs with an electrodeionizer which has an internal ion exchange resin.

Abstract: Electromagnetic waves are driven in the pipe to be inspected in the piping system by a transmitting antenna of a transmitter, to be propagated in the pipe; while a receiving antenna of a receiver is moved outside the pipe along the pipe, to receive leaking electromagnetic waves for inspecting elements of the piping system, and the location concerned of each element of the piping system to be inspected is detected in reference to the location of the receiving antenna where the level of electromagnetic waves received by the receiver becomes a peak. The locations to be inspected are the damaged portions such as holes formed by corrosion, cracks, etc. in the pipes, and the locations of joints, etc. It is also possible to move the transmitting antenna outside along the pipe, while arranging the receiving antenna at proper place in the pipe. Furthermore, it is also possible to move both the transmitting antenna and the receiving antenna in synchronization to effect the above inspection.

Abstract: Electromagnetic waves are driven in the pipe to be inspected in the piping system by a transmitting antenna of a transmitter, to be propagated in the pipe; while a receiving antenna of a receiver is moved outside the pipe along the pipe, to receive leaking electromagnetic waves for inspecting elements of the piping system, and the location concerned of each element of the piping system to be inspected is detected in reference to the location of the receiving antenna where the level of electromagnetic waves received by the receiver becomes a peak. The locations to be inspected are the damaged portions such as holes formed by corrosion, cracks, etc. in the pipes, and the locations of joints, etc. It is also possible to move the transmitting antenna outside along the pipe, while arranging the receiving antenna at proper place in the pipe. Furthermore, it is also possible to move both the transmitting antenna and the receiving antenna in synchronization to effect the above inspection.

Abstract: An air conditioning unit is capable of preventing a liquid absorbent from crystallizing, thereby enhancing reliability of the operation thereof. A given amount of refrigerant is supplied to dilute the liquid absorbent when the air conditioning unit stops in operation, and it is circulated in lines and components of the air conditioning unit, thereby cleansing the liquid absorbent remaining in the components or lines, and the liquid absorbent is returned to the liquid tank, so that the liquid absorbent is prevented from crystallizing, whereby reliability of the operation is enhanced.

Abstract: The present invention relates to a low nitrogen oxygen regenerative burner, a regenerative burner system and a regenerative burning method. The low nitrogen oxide regenerative burner is comprised of one or more pairs of regenerators having a regenerating section inside and air supply and exhaust ports which open directly opened into a furnace; and one or more fuel injection nozzles for each of the air supply and exhaust ports, which also open directly into the furnace at locations apart from the corresponding air supply and exhaust port. The regenerative burner system consists of a furnace body, the low nitrogen oxide regenerative burner and a control means. The regenerative burning method is the process whereby air is preheated in the regenerator, injected from the air supply and exhaust ports of the regenerators into the furnace, fuel from the fuel injection nozzles located apart from the air supply and exhaust ports, is injected.

Abstract: A reversible lining tube for repairing an existing pipeline is reversible into the existing pipeline so that its initial inner surface becomes its outer surface which adheres to the internal surface of the pipeline. In detail, the reversible lining tube includes an elastomer layer and a flock layer, prior to reversal into the existing pipeline the elastomer layer is an outer layer and the flock layer is an inner layer, upon reversal into the existing pipeline the elastomer layer becomes an inner layer and the flock layer becomes an outer layer which adheres to the internal surface of the existing pipeline.

Abstract: The present invention concerns a low nitrogen oxides generating combustion apparatus and a low nitrogen oxides generating combustion method. The apparatus and method of the present invention, the effect of self-induced exhaust gas recirculation can be obtained to the maximum extent, and the lower flame temperature and the lower oxygen concentration assure remarkably low NOx generation.

Abstract: There is provided a suction system for use in a method of lining the internal surface of a pipe, said suction system comprises a pig receiving device to be attached to an open end of the pipe, a liquid receiving tank connected with the pig receiving device, and a suction pump connected with the liquid receiving tank. Further, a pig detecting device for detecting the passing of a pig is provided between the open end of the pipe and the pig receiving device, a suction force controlling device is provided between the pig receiving device and the liquid receiving tank, and a gas-liquid separation apparatus is provided between the liquid receiving tank and the suction pump.

Abstract: An absorption cool-water machine including a high quality fuel system and an exhaust heat utility system and apparatus and method for controlling the same is described in which the control has improved effectiveness in preventing the occurrence of crystallization in the exhaust heat exchanger tubing and/or corrosion resulting from an increase in high temperature regenerator temperatures and to otherwise prevent the production of unavailable refrigerant, save energy in an exhaust heat charge mode of operation, and to insure refrigerating ability even when exhaust water temperatures are low without reducing the effectiveness of the machine. In the described organization, a determination is made of the operative state of the exhaust heat utility system and adjustments are automatically made in supremum limiters for controlling the degree of opening of throttle valves for adjusting the supply of fuel and combustion air to the high quality fuel system that supplies heat to the high temperature regenerator.

Abstract: There is provided a method of lining the internal surface of a pipe involving a larger diameter portion, said method comprising the steps of inserting a first pig into the pipe from an open end thereof, said first pig being a spherical body made of a resilient material having a diameter larger than the pipe inner diameter and having a number of grooves formed on the surface thereof for permitting air escape, injecting behind the first pig a necessary amount of resin into the pipe, inserting behind the resin a second pig into the pipe, said second pig having a diameter smaller than the pipe inner diameter such that a resin lining layer having a desired thickness may be formed on the internal surface of the pipe, providing a positive pressure and applying the positive pressure behind the second pig in the pipe, and causing the first pig, the resin and the second pig to move through the pipe along the entire length thereof by the positive pressure, so as to form a resin lining layer on the internal surface of th

Abstract: A plurality of flow velocity sensors are vertically installed in line at different positions in the same cross section in a gas flow passage in a pipe. Detection signals from the flow velocity sensors are inputted to a mean flow velocity computing unit which calculates a mean value of flow velocity measurements. The mean flow rate calculated at the mean flow velocity computing unit is converted into a flow rate by a flow rate computing unit to be displayed by a display. Regardless of flow velocity distribution in the pipe, which may change due to differences in the pipe shape, flow rates are accurately measured. As a result, flow rates are accurately measured over a wide range.

Abstract: A method of repairing an existing pipe includes steps of introducing at least one leading pig into the existing pipe through one open end thereof, introducing behind the leading pig a necessary amount of adhesive agent into the existing pipe through the same open end thereof, fixing one end of a liner tube at the above open end of the existing pipe, in a manner such that the liner tube may be reversed into the existing pipe, and providing a negative pressure into the existing pipe through an opposite open end thereof to cause the leading pig and the adhesive agent to move forwardly and thus cause the unfixed portions of the liner tube to be reversed into the existing pipe. The adhesive agent is caused to move through the existing pipe in the form of a plug flow, thereby coating the whole internal surface of the existing pipe with the adhesive agent, ensuring that the liner tube reversed into the pipe may adhere to the internal surface of the existing pipe.