Pipeline shutoff valves. Standards for seal tightness
Арматура трубопроводная запорная. Нормы герметичности затворов. |
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GOST 3877-88Petroleum products. Method for determination of … |
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OST 24.152.01-77Coupler horns for freight and passenger … |
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RD 04-265-99Regulations on the Procedure for Training and … |