名词
中文翻译：机器螺栓
同义词：
['machine screw', 'fastener']
例句：
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1.The machine bolts are securely attached to the frame.
这些机器螺栓牢固地固定在框架上。
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2.The engineer used a machine bolt to tighten the nuts.
工程师用一个机器螺栓来拧紧螺母。
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3. The machine bolts were removed for maintenance.
为了维护，需要拆卸机器螺栓。