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Pipeline fittings. Ball seals. Design, basic dimensions and specifications

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Pipeline gate valves. Changing grade of gate sealability depending on operating conditions and in the process of operation

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Pipeline fittings. Periodical tests of bellows. General requirements

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Pipeline fittings. Control valves. Procedure for selection in automatic control systems

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Pipeline fittings. Incoming materials, semifinished products and components inspection

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Pipeline fittings. Electrolytic, chemical, anodic and diffusion coatings

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