column bolt

例句：

1. 1. The engineer used a column bolt to secure the roof.
   工程师用一个列柱螺栓来固定屋顶。
2. 2.The carpenter tightened the column bolts before painting the wood.
   木匠在刷木漆前紧固了列柱螺栓。
3. 3. The construction crew replaced the damaged column bolts with new ones.
   建筑工人用新的列柱螺栓替换了损坏的螺栓。