Vi fant 1 definisjoner av rock drill på engelsk.
Noun |
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| rock drill - a drill for penetrating rock | ||
| bore bit, borer, stone drill | ||
| drill (military) the training of soldiers to march (as in ceremonial parades) or to perform the manual of arms | ||
| cross bit a rock drill having cruciform cutting edges; used in mining | ||
| star drill a steel rock drill with a star-shaped point that is used for making holes in stones or masonry; it is operated by hitting the end with a hammer while rotating it between blows | ||