名词
中文翻译：环形螺栓
同义词：
['ring-bolt', 'ring-head bolt']
例句：
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1.The car's engine is a ringbolt that needs to be tightened every few months.
汽车的发动机是一个需要每几个月拧紧一次的环形螺栓。
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2.He used a ringbolt to hold the door open until he could get it fixed.
他用一个环形螺栓把门打开，直到他能把门修好。
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3.The construction workers used ringbolts to secure the wooden beams together.
建筑工人使用环形螺栓将木梁固定在一起。