名词短语
中文翻译：顶铁和螺丝
同义词：
['顶丝，顶杆，顶螺钉例句：1. The top iron and screw are essential for the operation of the machine.（顶铁和螺丝是机器操作所必需的。）']
例句：
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1. The top iron and screw are essential for the operation of the machine.
顶铁和螺丝是机器操作所必需的。
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2.The engineer used a top iron and screw to tighten the bolts.
工程师使用顶铁和螺丝来紧固螺栓。
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3.The top iron and screw were designed to ensure the stability of the structure.
顶铁和螺丝的设计旨在确保结构的稳固。