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Power transformers. Methods of measuring partial discharge characteristics during power frequency voltage testing
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Terminal contact blocks with flat terminals. Design, main parameters and dimensions
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Electrical contact connections. Acceptance and methods of tests
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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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