名词
中文翻译:凹形头部螺栓
同义词:
['concave', 'convex', 'head bolt', 'head screw']
例句:
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1.The engineer used a concave head bolt to secure the roof.
工程师用一个凹形头部螺栓来固定屋顶。
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2.The carpenter installed a convex head bolt for the door hinges.
木匠为门铰链安装了凸形头部螺栓。
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3.The construction worker tightened the head bolts on the scaffolding.
建筑工人在脚手架上紧固了螺栓。