rod crack

例句：

1. 1. The old wooden chair had a rod crack in the middle.
   那把旧木椅中间有一条杆裂缝。
2. 2.The car's suspension rod cracked under heavy use.
   这辆车的悬挂杆在重载下开裂了。
3. 3.The engineer inspected the rod crack and found it to be a minor issue.
   工程师检查了杆裂缝，发现它只是一个小问题。