The drill has variable speed control.

这钻机有变速控制。

《牛津词典》

The Ethiopians do not control the Ogaden and we have warned the Chinese that we will not allow them to drill there.

埃塞俄比亚人并不控制欧加登，而且我们已经警告过中国人，我们不会允许他们在那里钻探。

youdao

This pressure must be under control, and we control it by means of the mud which we circulate down the drill pipe.

这种压力必须加以控制，我们让泥桨顺着钻杆向下循环，用这种方法来控制压力。

youdao

The muscular man is working hard to control a powerful drill that is cutting through the rock that surrounds him.

VOA: special.2009.03.23

To complete the drilling without mishap, the rover's operators on Earth had to devise new procedures to solve a series of computer software problems that affected the craft's motor's control systems, said JPL drill-systems engineer Scott McCloskey.

WSJ: Rover on Mars Extracts First Rock-Core Sample

With full control of its plant in Abu Dhabi, Hilong has an additional drill pipe production capacity of 11, 023 tons, compared with its 44, 753 tons on the mainland.

FORBES: Add Oil! Chinese Drill-Pipe Maker Ventures Into The Middle East

At 8:20 p.m. on the day of the explosion the pressure data suggest there was a constant flow of sea water being pumped into the drill pipe that was displacing the heavier mud system which was the primary pressure control for the well.

WSJ: The Oil Disaster Is About Human, Not System, Failure