翻译成中文:It is used to lift sections of pipe,which are lowered into the hole made by the drill.

问题描述:

翻译成中文:It is used to lift sections of pipe,which are lowered into the hole made by the drill.

它是用来抬起部分管道,然后降低到由钻头打出的孔中。

它过去被用来抬起部分管道,那些被降低到由钻头打出的孔中。

它被用来举起进入被钻孔机挖的洞之内被降低的管的区段.