davit

例句：

1. 1.The crane is used to lift heavy loads.
   起重机用来吊起重物。
2. 2.The winch was used to pull the boat out of the water.
   绞盘被用来把船从水中拉出来。
3. 3.The crane operator needs to be trained in safe lifting procedures.
   起重机操作员需要接受安全起重程序的培训。