Abstract: A substrate for photomask has a top surface and a back surface, the substrate being square in shape, an end surface formed along the thickness thereof and a chamfered surface formed on a perimeter edge region where the end surface and the top surface meet and another region where the end surface and the back surface meet, a size of the perimeter edge of the substrate is 300 mm or more on a side and the end surface and the chamfered surface each has a roughened surface having a surface roughness (Ra) ranging from 0.03 ?m to 0.3 ?m.

Abstract: A fuel feed apparatus feeds fuel in a fuel tank to the outside of the fuel tank. The fuel feed apparatus includes a flange that covers an accommodation hole of the fuel tank, a fuel pump that pumps fuel, and a sub-tank accommodating the fuel pump. The sub-tank is capable of reciprocating relative to the flange in the axial direction of struts, which support the flange. The struts are positioned circumferentially outwardly to the sub-tank. The sub-tank has a lid 70. Holding portions are provided on the lid to axially movably hold the struts. Thus, an assembling work of the fuel feed apparatus can be eased without damaging internal components, when the struts are assembled.

Abstract: A fuel feed apparatus feeds fuel in a fuel tank to the outside of the fuel tank. The fuel feed apparatus includes a flange that covers an accommodation hole of the fuel tank, a fuel pump that pumps fuel, and a sub-tank accommodating the fuel pump. The sub-tank is capable of reciprocating relative to the flange in the axial direction of struts, which support the flange. The struts are positioned circumferentially outwardly to the sub-tank. The sub-tank has a lid 70. Holding portions are provided on the lid to axially movably hold the struts. Thus, an assembling work of the fuel feed apparatus can be eased without damaging internal components, when the struts are assembled.

Abstract: A substrate for photomask has a top surface and a back surface, the substrate being square in shape, an end surface formed along the thickness thereof and a chamfered surface formed on a perimeter edge region where the end surface and the top surface meet and another region where the end surface and the back surface meet, a size of the perimeter edge of the substrate is 300 mm or more on a side and the end surface and the chamfered surface each has a roughened surface having a surface roughness (Ra) ranging from 0.03 &mgr;m to 0.3 &mgr;m.

Abstract: When carrying out a weighted addition on the in-phase added values of pilot signals and simulated pilot signals of the data section about the nth slot, the channel estimation circuit 104 controls the weighting factors according to the number of iterations of channel estimation. That is, the channel estimation circuit 104 carries out channel estimation by decreasing weights of simulated pilot signals in addition to pilot signals in a stage in which the number of iterations is small and by increasing weights of simulated pilot signals in addition to pilot signals in a stage in which the number of iterations is large. In iterative channel estimation, this makes it possible to improve the accuracy of channel estimation in the initial stage and carry out high accuracy channel estimation with a small number of iterations of recursive channel estimation.

Abstract: An aluminum alloy sheet combining excellent press formability and spot weldability is disclosed. A chromate film of about 1.0 to 50.0 mg/m.sup.2 expressed in terms of metallic chromium is formed as a first layer on an aluminum alloy sheet, and an organic resin film containing about 60-95% by weight of organic lubricant and having a thickness of 0.02 to 0.90 .mu.m in terms of dry thickness is formed as a second layer on the chromate film. As the organic lubricant, a high-density polyethylene having a mean molecular weight of about 900 to 15,000 and a density of about 0.93 g/ml or more is preferable. This aluminum alloy sheet can be effectively used for automobile body applications.

Abstract: A method including preparing an aluminum scrap containing a total of about 0.3 to 2.0 wt % of Fe and Si; melting and then adjusting the material composition so as to attain an Mg content of about 3 to 10 wt % or a composition further containing at least one of the elements Cu, Mn, Cr, Zr and Ti, each in the amount of 0.02 to 0.5 wt %; subjecting the material to casting, hot rolling, cold rolling and continuous annealing to obtain an aluminum alloy sheet having a tensile strength of about 31 kgf/mm.sup.2 or more; and applying a lubricant surface coating to impart a coefficient of friction of not more than about 0.11.

Abstract: The invention provides an aluminum alloy sheet having improved formability, an elongation of at least 30%, a sliding frictional resistance of up to 0.13 and minimized surface pressure dependency of sliding frictional resistance, comprising an aluminum alloy substrate containing at least 4 wt % of Mg and a Fe rich plating layer on a surface thereof in a coating weight of 1 to 50 g/m.sup.2. Also provided is a bake hardenable, surface treated aluminum alloy sheet having improved formability, an elongation of at least 25%, a sliding frictional resistance of up to 0.13 and minimized surface pressure dependency of sliding frictional resistance, comprising a bake hardenable aluminum alloy substrate containing Mg and Si in an amount of at least 0.4 wt % calculated as Mg.sub.2 Si and a Fe rich plating layer on a surface thereof in coating weight of 1 to 50 g/m.sup.2. By forming a zincate layer as an undercoat below the Fe rich plating layer, the plating adhesion is further improved.

Abstract: A method of producing a hot-dip galvannealed steel sheet from a very-low-carbon cold-rolled steel sheet containing not less than 0.01 wt % but not more than 0.1 wt % of Ti, by subjecting the cold rolled steel sheet to a process conducted in a continuous hot-dip galvanizing system including a heat treatment, hot-dip galvanizing and a subsequent galvannealing. The method is characterized by the steps of: subjecting the cold-rolled steel sheet to a degreasing and an acid cleaning; subjecting the degreased and acid-cleaned steel sheet to a heat treatment conducted in a reducing gas atmosphere; and cooling the heat-treated steel sheet at a temperature not lower than 380.degree. C. but not higher than the hot-dip galvanizing bath temperature, before the steel sheet is subjected to the hot-dip galvanizing. The very-low-carbon cold- rolled steel sheet contains, besides not less than 0.01 wt % but not more than 0.1 wt % of Ti, not more than 0.005 wt % of C, not less than 0.01 wt % but not more than 0.

Abstract: A continuous dip-plating apparatus for a steel strip has a pot containing a metal melt which forms a plating bath, a device for causing the steel strip to run through the plating bath such that the steel strip makes a turn around a sink roll in the plating bath so as to be pulled upwardly above the surface of the plating bath, and a wiping device disposed above the pot and adapted for adjusting the amount of deposition of the metal melt to the steel strip. The apparatus further has a pair of flow regulating plates for suppressing deposition of dross to the steel strip. The flow regulating plates are arranged in parallel with and in the vicinity of the portion of the steel strip running upwardly through the plating bath with the upper ends of the flow regulating plates being disposed substantially at the same level as the plating bath.

Abstract: A flexible hot rolled steel sheet having an improved deep drawability comprises not more than 0.10 wt % of C, less than 0.20 wt % of Mn, 0.10-2.0 wt % of Cr, 0.002-0.100 wt % of Al, and the balance being Fe and inevitable impurities or further contains particular amounts of at least one of Ti, Nb and Zr and/or B. Such a hot rolled steel sheet has a tensile strength of not more than 35 kgf/mm.sup.2 and a total elongation of not less than 50%.

Abstract: A laminar flow cooling system employs a laminar flow nozzle comprising a pair of plate members defining slit through which cooling water flows to form a cooling water screen. One of the plate members of the laminar nozzle is deformable at least in a direction perpendicular to the cooling water flow direction to adjust the path area in the nozzle. At least one of the plate member is preferably responsive to the cooling water pressure to cause variation of the path area for adjusting the cooling water path area.

Abstract: A hot rolled steel sheet having a specific composition and having a specific small grain size of ferrite constituting the steel sheet has high resistances against secondary-work embrittlement and brazing embrittlement and is adapted for ultra-deep drawing. The specific small grain size of the ferrite can be obtained by limiting the hot rolling condition of a slab having the specific composition.

Abstract: A method of manufacturing a cold-rolled steel sheet having a good deep drawability is disclosed, wherein a hot rolled steel sheet having a composition of C.ltoreq.0.0035%, Si.ltoreq.1.0%, Mn.ltoreq.1.0%, Al:0.005-0.10%, P.ltoreq.0.15%, N.ltoreq.0.0035%, S.ltoreq.0.015%, Ti: (48/14N(%)+48/32S(%)) or {4.times.(C(%)+N(%))}.about.(3.48/12C(%)+48/14N(%)+48/32S(%)) and Nb: (0.2.93/12C(%)).about.(93/12C(%))% is cooled within 2 seconds after the completion of finisher rolling and then at an average cooling rate of not less than 10.degree. C./sec until it arrives at a coiling step, and then the cooled steel sheet is coiled at a temperature of not more than 710.degree. C., subjected to a cold rolling at a reduction of not less than 50%, which was subjected to a continuous annealing in a heatcycle inclusive of heating from 400.degree. C. to 600.degree. C. at a heating rate of not less than 5.degree. C./sec and soaking at a temperature range of 700.degree. C.-Ac.sub.3 point for 1 second or more.

Abstract: The invention relates to a method of manufacturing a high-strength steel sheet by annealing the steel sheet after cold rolling. In order to obtain the low-yield ratio, high-strength steel sheet having high strength and good ductility, resistance to secondary cold-work embrittlement and spot weldability at low cost, the steel sheet containing 0.03-0.15% of P and specified amounts of C, Mn and Al as basic components and optionally containing, as a selective component, at least one element selected from a group of Si, Cr, Mo and B and a group of Nb, Ti, and V in such amounts as to meet the relation formula restricting the total content of Mn, Si, P, Cr and Mo is subjected to annealing under the conditions that the sheet is heated at a temperature of from Ac.sub.1 transformation point to 950.degree. C. for from 10 seconds to 10 minutes and cooled in such a control manner that an average cooling rate between 600.degree. C. and 300.degree. C.

Abstract: The invention relates to a method of manufacturing a high-strength steel sheet by annealing the steel sheet after cold rolling. In order to obtain the low-yield ratio, high-strength steel sheet having high strength and good ductility, resistance to secondary cold-work embrittlement and spot weldability at low cost, the steel sheet containing 0.03-0.15% of P and specified amounts of C, Mn and Al as basic components and optionally containing, as a selective component, at least one element selected from a group of Si, Cr, Mo and B and a group of Nb, Ti, and V in such amounts as to meet the relation formula restricting the total content of Mn, Si, P, Cr and Mo is subjected to annealing under the conditions that the sheet is heated at a temperature of from Ac.sub.1 transformation point to 950.degree. C. for from 10 seconds to 10 minutes and cooled in such a control manner that an average cooling rate between 600.degree. C. and 300.degree. C.

Abstract: A laminar flow cooling system employs a laminar flow nozzle comprising a pair of plate members defining slit through which cooling water flows to form a cooling water screen. One of the plate members of the laminar nozzle is deformable at least in a direction perpendicular to the cooling water flow direction to adjust the path area in the nozzle. At least one of the plate member is preferably responsive to the cooling water pressure to cause variation of the path area for adjusting the cooling water path area.

Abstract: High tensile strength steel sheets having high press formability and excellent shape-fixability in which an average roughness in surface Ha is 0.4-1.8 .mu.m, PPI value is more than 80 at a cut off level of 0.5 .mu.m, the proportional limit stress is less than 20 kg/mm.sup.2 and the microstructure consists of ferrite grains dispersed with fine martensite islands, are produced by cold rolling a hot rolled steel sheet containing 0.005-0.15% of carbon, and manganese, if necessary boron, molybdenum, chromium, silicon, nickel and copper within a range of 0.27-3% of Mneq. shown by the following formula (1)Mneq.=Mn+124B+3Mo+3/2Cr+1/3Si+1/3Ni+1/2Cu (1)so as to obtain the cold rolled steel sheet having the above described surface property and then heating the cold rolled steel sheet to an intercritical temperature between A.sub.1 and A.sub.3, after which cooling the heated steel sheet at a particularly defined cooling rate.