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Pipeline valves. Knife gate valves for trunk pipelines. General specifications

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Polymer composites. Method for determination of density of sandwich core materials

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Unified system of design documentation. Graphical conventions in diagrams. Apparatus and telegraph repeaters

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State system for ensuring the uniformity of measurements. Measuring installations - standards of 2-nd class of moisture content of firm and loose materials. Verification procedure

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Fire helmets. General technical requirements. Test methods

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Seamless rubber surfaces. Technical requirements and test methods

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