block drill 阻挡练习
drill collet-spring block ring 弹性挡圈
The rover will drill into the block and cook a sample from it.
MSN: New Mars rover hunts for life by 'cooking' rocks
He aims to drill 300 wells in the Olmos block and to build a new gas-processing plant.
FORBES: The Crossing
In his basement workshop on a recent evening, Mr. Baum rotated from his drill station to his sanding station, working on a fresh block of wood.
WSJ: Gentlemen, Start Your Little Cars: These Derbies Are for Grown-Ups
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