timber jack chain

例句：

1. 1.The lumberjacks used the chains to cut down the trees.
   伐木工人使用这些链条来砍倒树木。
2. 2. Timber saw chains are essential for logging operations.
   木材锯链对于伐木作业来说是必不可少的。
3. 3.The timber saw chain was a crucial tool in the construction of the new bridge.
   木材锯链是建造新桥的关键工具。