Range hypothesis vent plug and tube joint is not correct, then in the transformer oil injection will constitute a bubble chamber.
假设放气塞和管接头的方位不正确，那么在变压器注油以后会构成气泡腔。
The vent is opened in summer to let out most of hot air inside double-layer sealed thermal chamber into exterior space.
夏季开启出风口，将双层封闭热通道内大部分热空气排出室外。
The vent is opened in summer to let out most of hot air inside double-layer sealed thermal chamber into exterior space.
夏季开启出风口，将双层封闭热通道内大部分热空气排出室外。
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