Russian standards PDF
Welding production qualification system. Part 2. Welding personnel qualification. Rules
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Welding production qualification system. Part 3. Company status verification to perform welding operations. Rules
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Welding production qualification system. Part 4. Welding consumables qualification. Rules
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Welding production qualification system. Part 5. Welding equipment qualification. Rules
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Optics and photonics. Semiconducting photoelectric detectors. Photoelectric and photoreceiving devices. Terms and definitions
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Optics and photonics. Photodetector devices of second and next-generations. Methods for photoelectric parameters measuring and determination of characteristics
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