Russian standards PDF
Mechanical vibration. Industrial fans. Measurement of vibrations
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Equipment and components intended for use in potentially explosive atmospheres in underground mines
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Longwall powered roof chocks. Basic parameters. General technical requirements. Test methods
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Explosive atmospheres. Part 13. Equipment protection by pressurized room 'p'
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Explosive atmospheres. Part 28. Protection of equipment and transmission systems using optical radiation
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Explosive atmospheres. Part 33. Equipment protection by special protection 's'
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