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ADJ (of joints, cylinders, etc) being sealed in such a way that steam cannot leak out (接头、汽缸等)汽密的; 不泄露蒸汽的
He's been led into the tight maze of pipes that make up the prison steam room.
他被领到了一个密集地布满管道的迷宫似的地方，他估计是蒸汽房。
youdao
The chamber is air tight so the biogas let off from the little digesters can be captured and used to power the steam generator that run the stills.
FORBES: DONQ: LEADING LIQUOR TO SUSTAINABILITY
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