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Revers pipe fitting for thermal power-stations electric stations. Types and main parameters
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Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries). Part 2. General protection requirements
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Tramway and trolleybus overhead trolley wire supporting devices. General specifications
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Electric lamps and starters. General requirements for export
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Short-circuits in electrical installations. Calculation methods in a. c. electrical installations with voltage below 1 kV
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