peg-and-cup dowel

例句：

1. 1. The carpenter used a peg-and-cup dowel to secure the wooden frame together.
   木匠使用一个插销和杯形榫头将木框架固定在一起。
2. 2.The engineer designed a new bolt that could withstand greater loads.
   工程师设计了一种新螺栓，能够承受更大的载荷。
3. 3. The construction workers used screws and bolts to reinforce the walls of the building.
   建筑工人使用螺丝和螺栓加固建筑物的墙壁。