Don't switch on during drilling operation.

钻井作业期间不能合闸。

youdao

If the initial workpiece is solid, a drilling operation must be performed first.

如果初始工件是实心的，则必须首先进行钻孔作业。

youdao

When he came here, we had coped with all kinds of difficulties in drilling operation.

当他来到这儿的时候，我们已经解决了钻井中的各种困难。

youdao

"But the problem on the relief well is not simply drilling all the way down, it is also connecting it up, and that is a delicate operation that could take some time."

VOA: standard.2010.07.16

Thirty-seven percent of the Gulf is closed to fishing because of an accident involving a deepwater drilling operation.

WHITEHOUSE: Press Briefing

The blame is being laid squarely on the shoulders of BP, under whose auspices the deep-sea drilling operation is being conducted.

FORBES: Blame Big Bad BP For Now, but Where Is the Next Oil to Come From?

Alternatively, they like when an energy manufacturing plant is built in their district, or a fossil fuel mining or drilling operation occurs in their district.

FORBES: What Do Energy Sector Jobs Do For Us?