Abstract: A formation of a biofilm is suppressed in piping having a relatively small liquid flow rate. A liquid processing nozzle connected to a liquid piping between a handpiece and a water supply source piping includes a nozzle body in which a liquid inlet, a liquid outlet, and a liquid flow path communicating the liquid inlet and the liquid outlet are formed, and a plurality of protrusions protruding from an inner surface of the liquid flow path into the liquid flow path. The protrusions are arranged so that protrusion amounts from the inner surface of the liquid flow path into the liquid flow path gradually increase as they go from an upstream side to a downstream side of the liquid flow path in a liquid flow direction from the liquid inlet to the liquid outlet.

Abstract: Disclosed are(1) a composite material of aluminum powder containing spherical carbon particles;(2) a composite material of aluminum powder having a good self-lubricity and a high wear resistance and consolidated with a mixture of(i) 100 parts by weight of aluminum particles of about 1 to about 200 .mu.m in mean particle size; and(ii) about 1 and about 100 parts by weight of spherical carbon particles of about 1 to about 50 .mu.m in mean particle size; and(3) a composite material of aluminum powder having a good self-lubricity, a high wear resistance and a high strength and consolidated with a mixture of(i) 100 parts of aluminum alloy particles containing about 0.3 to about 15% by weight of magnesium and having a mean particle size of about 1 to about 200 .mu.m; and(ii) about 1 to about 100 parts by weight of spherical carbon particles having a mean particle size of about 1 to about 50 .mu.m.

Abstract: The invention provides a process for preparing a large-sized P/M aluminum alloy product comprising:extruding at a temperature between 350.degree. and 500.degree. C. and at an extrusion ratio of 2 to 10, aluminum alloy powder consisting essentially of (a) 5 to 30% by weight of Si, (b) 0.5 to 10% by weight of at least one species selected from the group consisting of Cu, Mg, Fe, Ni, Cr, Mn, Mo, Zr and V with the proviso that the total amount of these species cannot exceed 30% by weight, and (c) aluminum in a remaining amount.

Abstract: An automatic frequency pulling circuit produces a signal in synchronism with a horizontal synchronizing signal from a video signal processing device or the like. The automatic frequency pulling circuit comprises an equalizing pulse remover responsive to a synchronizing signal separated from a composite video signal for alternately removing equalizing pulses therefrom, and a PLL circuit composed of at least a phase comparator and a voltage-controlled oscillator. The phase comparator is arranged to compare the phases of an output from the equalizing pulse remover and an output from the voltage-controlled oscillator, for thereby producing the signal in synchronism with the horizontal synchronizing signal. The signal thus generated is utilized in a video monitor, for example, to display accurate images thereon.

Abstract: Improved method for producing anode aluminum foils for electrolytic condensers used in low and intermediate voltage applications in which a hard tempered aluminum foil consisting of 99.9 to 99.99% pure aluminum added with 0.010 to 0.25% by weight of copper is electrolytically etched in an aqueous solution of neutral chlorides such as sodium chloride, aluminum chloride or potassium chloride.

Abstract: Aluminum foil for an electrode of an electrolytic capacitor is disclosed. The foil comprises at least one core layer adapted to prevent the growth of pits by electrolytic etching, and outer layers formed on both surfaces of the core layer. A large number of etching pits are produced in the outer layers. In a modification, the core layer contains more iron than the outer layers. Again in a modification, the core layer is covered or contained with aluminum oxides or hydroxides.