楔形榫头

例句：

1. 1. The carpenter used a wedge-shaped nut to tighten the screws.
   木匠使用楔形螺母来紧固螺丝。
2. 2. The construction of the bridge required precise alignment of the wooden blocks with the wedge-shapedjoints.
   桥梁的建设需要精确对齐木块与楔形接头。
3. 3. The engineer designed the machine to fit perfectly into the wedge-shaped slot.
   工程师设计的机器完美地适应楔形槽口。