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lug nut

noun
🔊/ˈlʌɡ nʌt/
🔊/ˈlʌɡ nʌt/
(North American English)
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  1. a small piece of metal with a hole through it that screws on to the bolts that attach a wheel to a vehicle
    • A slightly loose lug nut will grow looser as a wheel experiences greater pressures during turns. 当车轮在转弯时承受更大的压力时，稍微松动的凸耳螺母会变得越来越松动。