名词中文翻译
中文翻译：内部螺纹
同义词：
['internally threaded', 'internally threaded shaft']
例句：
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1. The screws are internallythreaded for easy installation.
螺丝是内部螺纹的，便于安装。
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2. Themachine has an internallythreaded shaft that can beadjusted for different applications.
这台机器有一个可调整的内部螺纹轴，适用于不同的应用。
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3. The bolts in thenut are internally threaded to ensurea secure fit.
螺母中的螺栓是内部螺纹的，以确保牢固的连接。