a room between two areas that have different air pressure, allowing you to go from one area to the other:
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Parts of ships & boats
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a bubble in a pipe that prevents liquid from flowing along it
Building: plumbing & pipes & sewage
英语词典包含110679条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。