A Lead Structure for Liquid-Immersed Rectifier Transformers

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A heat-dissipation circulating-air cooling device for a fully insulated gas-insulated switchgear

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An Insulation Structure for Dry-Type Power Transformers Used in Rail Transit

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An Immersed Insulation System for Distribution Transformers

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Improved Cooling Structure for Oil-Immersed Distribution Transformers

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Design Patent Certificate

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