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Welding of pipes with tube grids of heat exchangers made of alloys of grades PT-7M and PT-3V. Typical technological process
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Natural dressed skins of baum marten, stone marten, kidus and charsa. Specifications
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Textiles. Quantitative chemical analysis. Part 22. Mixtures of viscose or certain types of cupro or modal or lyocell and flax fibres (method using formic acid and zinc chloride)
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The procedure for the development, registration and approval of technological processes at machine-building enterprises of the industry
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