Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Part 5. Resistance to earth
Sulfide copper-nickel ore. Mass-spectrometry method for determination of platinum, palladium, rhodium, ruthenium, iridium and cold content with preliminary collecting for nickel matte
State system for ensuring the uniformity of measurements. State primary standard and all-union verification schedule for means measuring mass flow of liquid within the range of 1x10 in minus 3 degree up to 2x10 in 3 degree kg/s
