A hob which includes a cylindrical body having a longitudinal axis, a plurality of tooth elements each with a top edge portion of the same height arranged in succession along at least one helical line extending around the longitudinal axis of the hob wherein shoulder portions of leading or trailing sides of each of the tooth elements are reduced in their basic contour in staggered fashion, each of the tooth elements including a first shoulder edge portion intersecting the top edge portion at a d...

A food washing apparatus of the invention includes an ozonized water generator (10), a cylindrical washing tank (1) in which the food materials are put and which can rotate to wash the food materials, a drainage part (4) formed at a part of the washing tank (1) and including openings to such a degree that water passes through and the food materials do not pass through, and wash water pipings (2, 9) which are inserted and disposed in the washing tank (1) in an axial direction and in which water s...

A method for manufacturing a multilayered substrate for a semiconductor device, as well as a semiconductor device, is provided, the multilayered substrate exhibiting an excellent thermal conduction property and an excellent heat spreading effect without occurrence of warp and deformation. A diamond layer is formed through vapor phase deposition on one principal surface of a first silicon substrate by a CVD method. A SiO.sub.2 layer is formed on this diamond layer. A SiO.sub.2 layer is formed on ...

A feed antenna includes a pair of conductive members, a dielectric waveguide placed therebetween, a dielectric member that is placed between the conductive members and located close to the dielectric waveguide, and a plurality of dielectric binding sections for binding the dielectric waveguide to the dielectric member. One of the conductive members has a plurality of openings.

A method for manufacturing a porous dielectric substrate including patterned electrodes includes a patterned electrode-forming step of preparing a support plate having a releasable flat face and then forming the patterned electrodes on the flat face, a porous dielectric substrate-forming step of feeding a material for forming the porous dielectric substrate onto the flat face having the patterned electrodes arranged thereon to form the porous dielectric substrate in which the patterned electrode...

A flux-cored wire for gas-shielded arc welding comprises a steel sheath, and a flux filled in the steel sheath. The flux-cored wire has a C content of 0.20% by mass or below, a Si content in the range of 0.06 to 1.10% by mass, a Mn content in the range of 0.55 to 1.60% by mass, a Cr content of 2.60% by mass or below, a Mo content in the range of 0.30 to 1.50% by mass, a Mg content in the range of 0.20 to 1.50% by mass, a N content in the range of 0.005 to 0.035% by mass and a B content in the ra...

A methods for re-utilizing, for example, scrap steels are provided. A method is provided for separating Sn-containing oxides from steel by blowing Sn-containing oxides away from a steel using a gas. Also provided is a method of making a reclaimed steel by (a) heating a coated steel having an Sn-containing surface layer to oxidize at least a portion of the surface layer; (b) separating at least a portion of the surface layer from the coated steel to produce Sn-containing oxides and an uncoated st...

A hydraulic excavator includes a cab disposed on a front portion of a revolving upper structure. An internal combustion engine is mounted in a rear portion of the revolving upper structure, and an directional control valve is disposed in the front portion of the revolving upper structure at a position spaced laterally from the cab. The directional control valve is arranged longitudinally of the revolving upper structure. A hydraulic oil tank and a fuel tank for the internal combustion engine are...

Disclosed is a polyvinyl chloride recovering method for recovering polyvinyl chloride from waste including polyvinyl chloride by a continuous operation, and an system for carrying out the method, wherein the method comprises: an insoluble solid matter removing process of removing insoluble solid matters from a hot mixture of a solvent capable of dissolving polyvinyl chloride, and the waste; a solidifying process of solidifying polyvinyl chloride in water by bringing hot water into contact with a...

Radial cross sections of a male screw rotor and a female screw rotor at a contact portion therebetween for transmitting power from the female rotor to the male rotor are profiled in the shape of roulettes, for example, cycloids, generated by the rolling of rolling curves, for examples, circles, along pitch circles of the rotors.