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.
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.
Respiratory protective devices - Self-contained closed-circuit breathing apparatus, compressed oxygen type - Part 2: Short duration-compressed oxygen type for moderate work rates; requirements, testing, marking— 14 стр.
