名词
中文翻译：垫片
同义词：
['spacer', 'spacer material']
例句：
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1. The engineer used a spacer shim to adjust the bolts on the machine.
工程师使用垫片来调整机器上的螺栓。
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2. The spacer shim was designed to reduce vibration during operation.
垫片设计用来减少操作时的振动。
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3. The spacer shim is an essential part of the assembly process.
垫片是装配过程中必不可少的部分。