State system for ensuring the uniformity of measurements. State special standard and all-union verification schedule for means measuring volumetric flow of petroleum products within the range of 2,8x10in minus 6 degree up to 2,8x10 in minus 2 degree m3/sec
Occupational safety standards system. Equipment and facilities for prevention and localization explosions of dust-air mixtures in coal mines dangerous on gas and dust. General technical requirements. Safety requirements and test methods