winch chain and sprocket

例句：

1. 1. The winchchain was the only thing that could liftthe heavy load.
   绞车链条是唯一能举起重物的东西。
2. 2. The sprocket wasthe key to the machine's operation.
   滑轮是机器运转的关键。
3. 3. The winch chain and sprocket were used topull the car out of the ditch.
   绞车链条和滑轮被用来把汽车从沟里拉出来。