基本解释n. 中柱；[机] 中枢销；大螺栓同根派生 kingbolt相关词英英字典柯林斯英英字典 the pivot bolt that connects the body of a horse-drawn carriage to the front axle and provides the steering joint a similar bolt placed between a railway carriage and the bogies kingbolt剑桥字典kingbolt柯林斯字典