| Pipeline shutoff valves. Gate valve seal classes and standards
Арматура трубопроводная запорная. Классы и нормы герметичности затворов. |
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GOST R 55364-2012Electric locomotives. General technical … |
GOST 12.2.016-81SSBT. Occupational Safety Standards System. … |
GD Постановление 454 от 05.05.2012Government of the Russian Federation. … |