名词
中文翻译：球头圆锥形螺栓
同义词：
['ball head bolt', 'ball-headed bolt']
例句：
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1.The engineer used a ball-headed conical bolt to secure the roof.
工程师使用一个球头圆锥形螺栓来固定屋顶。
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2.He tightened the bolts on the door with a wrench.
他用扳手紧固了门上的螺栓。
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3.The construction worker used a ball-headed conical bolt to fasten the wooden planks together.
建筑工人用一个球头圆锥形螺栓将木板牢固地连接在一起。