Russian standards PDF
Explosive atmospheres. Part 35-1. Caplights for use in mines susceptible to firedamp. General requirements and test methods in relation to the risk of explosion
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Electrical apparatus for explosive gas atmospheres. Part 5. Powder filling 'q'
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Explosive atmospheres. Part 6. Equipment protection by liquid immersion 'o'
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Static electricity spark safety. General technical requirements and test methods
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Explosion-proof mine electromagnetic starters up to 1140 V. Technical requirements and test methods
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Plaster of Paris for medical use. General technical requirements. Test methods
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