Explosive atmospheres. Part 33. Equipment protection by special protection 's'
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Low-voltage power supplies, d.c. output. Part 6. Requirements for low-voltage power supplies of assessed performance
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Non-linear resistor type arresters for rated a.c. voltages from 3,8 to 600 kV. General technical specifications
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Electrical apparatus for use in the presence of combustible dust. Part 2. Test methods. Section 3. Method for determining minimum ignition energy of dust/air mixtures
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Enamelled round winding wires. Method of the elongation test
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