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。

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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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In this configuration, the HTP is passed over a catalyst pack to decompose it into steam and oxygen, but instead of igniting a fuel grain, this superhot gas is allowed simply to vent through the chamber nozzle.

BBC: Science & Environment