Russian standards PDF
Steel pipes, lined inside with a polyethylene shell. Specifications
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Non-destructive testing of welded joints of thermoplastics semi-finished products. Part 1. Visual examination
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Non-destructive testing of welded joints of thermoplastics semi-finished products. Part 2. X-ray radiographic testing
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Non-destructive testing of welded joints of thermoplastics semi-finished products. Part 3. Ultrasonic testing
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Non-destructive testing of welded joints of thermoplastics semi-finished products. Part 4. High voltage testingv
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Environmental protection. Soils. General requirements for protection against contamination when handling mineral fertilizers
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