1. the part of a bolt between the thread and the head. 
   螺钉的头部和螺纹之间的部分。
2. A bolt having a looped head designed to receive a hook or rope. 
   有眼螺栓带有圆圈头的螺栓，用来接钩子或绳子
3. a wrench with a hook that fits over a nut or bolt head. 
   有一个钩子套在螺母或螺栓头的扳手。
4. a wrench with a closed loop (a socket) that fits over a nut or bolt head. 
   有闭环（插槽）可以套在螺母或螺栓头上的扳手。
5. Containing a hexagon or shaped like one. 
   六边形的含有一个六边形或六边形状的

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