drill造句

A plug had been inserted in the drill hole.
钻孔已塞上了塞子。

The drill should be slowly rotated to ensure a clean hole.
钻头必须缓慢转动，以保证钻孔平整光滑。

It took five years to drill down to bedrock.
耗时五年才钻到了基岩。

• #drill