Safety in emergencies. Personal protective equipment of the respiratory organs. Gas masks and filtering self-rescuers. Evaluating the effectiveness of protection
Reciprocating internal combustion engines. Exhaust emission measurement. Part 2. Measurement of gaseous and particulate exhaust emissions under field conditions
State system for ensuring the uniformity of measurements. Optics and optical instruments. Field procedures for testing geodetic and surveying instruments. Part 6. Rotating lasers
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