Gas cylinder valves; test pressures 300 bar and 450 bar, with cylindrical thread for valve stem and gas cylinder neck for breathing apparatus; sizes, threads— 4 стр.
Electroplated Coatings; Nickel Plus Chromium Coatings on Steel, Copper, Copper Alloys and Zinc Alloys, Also Copper Plus Nickel Plus Chromium Coatings on Steel and Zinc Alloys— 7 стр.