Then there is the cementing of the wellhead, a process which is necessarily tricky.

接着是油井井口的水泥灌浆，这是一项相当棘手的任务。

youdao

Then there is the cementing of the wellhead, a process which is necessarily tricky.

接着是油井井口的水泥灌浆，这是一项相当棘手的任务。

youdao