名词
中文翻译：Unknown
同义词：
['valvestem', 'valve stem head', 'valve stembody']
例句：
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1. Thevalve-in-head is the partof the valve that allows fluid to flowthrough it.
阀门头是阀门中允许流体通过的部分。
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2. The valve-in-head was damaged during the installation process.
阀门头在安装过程中受损了。
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3. The valve-in-head is responsible for controllingthe flow of gases and liquids.
阀门头负责控制气体和液体的流动。