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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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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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Symmetrical telecommunication cables for digital communication. General specification
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Nuclear power plants. Instrumentation and control systems important for safety. Separation
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