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Water-tube boilers and auxiliary installations. Part 15. Acceptance tests

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Radio-frequency cable type PK 100-4-31. Specifications

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Industrial gas burners. Test methods

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Explosion-proof mine low-voltage complete control devices to 1140 V. Technical requirements and test methods

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Lamps and lamp systems. Photobiological safety

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Radio-frequency cable type PK 50-11-21. Specifications

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