名词
中文翻译：双头螺丝和螺母
同义词：
['doublescrew', 'double nut']
例句：
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1. The car had a twin screwand nut on the back.
汽车的后面有一个双头螺丝和螺母。
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2. Hetightened the twin screw and nuton the door hinge.
他拧紧了门铰链上的双头螺丝和螺母。
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3. The mechanic replaced the twinscrew and nut with a new one.
机械师用一个新的替换了原来的双头螺丝和螺母。