名词
中文翻译：内层油封
同义词：
['inner gasket', 'inner packing', 'inner seal']
例句：
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1.The inner oil seal is essential for preventing leaks in the engine.
内层油封对于防止发动机泄漏至关重要。
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2. The engineer carefully inspected the inner oil seal before starting the machine.
工程师在启动机器前仔细检查了内层油封。
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3.The inner oil seal was replaced after a few hours of operation to ensure proper functioning.
经过几个小时的运行后，更换了内层油封以确保正常工作。