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In addition, the insulation of the whole oil and gas pipe is strengthened.
另外，加强了整根油气管的保温。
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The primary winding is with oil-paper capacity insulation structure.
一次绕组采用油纸电容型绝缘结构。
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The primary winding is with oil-paper capacity insulation structure.
一次绕组采用油纸电容型绝缘结构。
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