单词	pop valve
释义	pop valve noun : a safety valve designed to open when the pressure of a fluid exceeds the force exerted by the spring that normally keeps the valve closed Word History Etymology pop entry 1
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英语词典包含469781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。