arbor bolt

例句：

1. 1. The arbor bolts were used to secure the branches together.
   这些树桩螺栓用来固定树枝。
2. 2. The workers had to remove the arbor bolts before they could start work on the new bridge.
   工人们必须先拆除这些树桩螺栓，才能开始建造新桥的工作。
3. 3.The arbor bolts are made from high-quality steel and are designed to withstand heavy loads.
   这些树桩螺栓由高质量的钢材制成，设计用于承受重载。