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Explosive atmospheres. Part 29-4. Gas detectors. General technical requirements and test methods of open path detectors for flammable gases

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Luminaires. Part 2. Particular requirements. Section 19. Air-handling luminaires. Safety requirements

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Switching surges from protective systems. Switching surges protection devices of coal mines underground electrical networks. Specifications and test methods

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Cylindrical manganese-zinc cells. General specifications

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Three-phase asynchronous squirrel-cage submersible electric motors series PED. Specifications

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Explosive atmospheres. Part 5. Equipment protection by powder filling 'q'

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