His other job is to handle pipe in the derrick while pulling out or running into the hole.

他的另一项工作是在起下钻时，操作井架中的钻杆。

youdao

His other job is to handle pipe in the derrick while pulling out or running into the hole.

他的另一项工作是在起下钻时，操作井架中的钻杆。

youdao