sinker chain

例句：

1. 1. The heavy metal detector detected a sinker chain in the tunnel.
   金属探测器在隧道里探测到了一个链条。
2. 2.The thief used a sinker chain to lock himself inside the safe.
   小偷用一个链条把自己锁在保险柜里。
3. 3. The engineer designed a sinker chain that could withstand high pressure.
   工程师设计了一根可以承受高压的链条。