名词
中文翻译：阀门盖
同义词：
['valve cap', 'valve plug', 'valvenut']
例句：
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1. The valvecover is designed to protect the valve fromdamage.
阀门盖的设计是为了保护阀门免受损坏。
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2. The technician carefully replaced the damaged valvecover.
技术人员小心翼翼地更换了损坏的阀门盖。
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3. The valve cover was removed to inspectthe inner workings of the machine.
为了检查机器的内部工作原理，需要拆卸阀门盖。