rowlock arch

例句：

1. 1.The rowlocks on the gate were rusted and worn out.
   大门上的锁链生锈且磨损严重。
2. 2. He had to break through the rowlocks to get in.
   他不得不打破栅栏才能进去。
3. 3. The rowlocks on the fence were old and broken.
   篱笆上的锁链旧且损坏了。