The core of a steam engine is a cylinder that is sealed at one end and has a moving piston at the other.
蒸汽机的核心是汽缸。它一端密封，另一端有个可以移动的活塞。
This robust encoder features a double sealed housing that allows the encoder to be operated in regulatory washdown and high pressure steam or caustic chemicals environments.
这一功能强大的编码器采用了双重密封的房屋，允许编码器将在监管冲洗高压蒸汽或环境腐蚀性化学品的经营。
However carefully boiler casings and steam pipes are sealed some heat escapes and is lost.
锅炉壳体和蒸汽管无论怎样仔细密封，总有一些热泄出耗失。 收藏。
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