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State system for ensuring the traceability of measurements. Gas analyzers and gas alarm devices for determination of combustible gases and vapors in working zone air. Verification procedure
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End caps for rolling bearing blocks. Technical requirements
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Civil defence. Engineering and technical equipment of civil defence constructions. Protective-hermetic and hermetic doors, gates and shutters for shelters. General technical requirements and control methods
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Compressors and vacuum pumps. Safety requirements. Part 2. Vacuum pumps
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