State system for the uniformity of measurements. Standard platinum resistance thermometers of the first and second grades. General technical requirements
Description in Russian:
Термометры сопротивления платиновые эталонные 1-го и 2-го разрядов. Общие технические требования
Reciprocating internal combustion engines. Safety requirements for engines, intended for use in potentially explosive atmospheres. Part 3. Group III engines for use in flammable dust atmospheres