名词
中文翻译：阀门外套
同义词：
['valve cover', "valve cap例句：1. The valve jacket is a crucial part of the engine's operation.（阀门外套是发动机运行的关键部分。）"]
例句：
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1. The valve jacket is a crucial part of the engine's operation.
阀门外套是发动机运行的关键部分。
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2.The valve jacket was designed to prevent leaks during operation.
阀门外套设计用来在运行过程中防止泄漏。
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3. The valve jacket was replaced after it failed to seal properly.
阀门外套在密封不当时被更换了。