lock-finger

例句：

1. 1.The lock-finger on the door is broken.
   门上的锁扣坏了。
2. 2. He used a lock-finger to secure the box.
   他用一个锁扣来固定箱子。
3. 3. The thief tried to use a lock-finger to steal the money.
   小偷试图用一个锁扣来偷钱。