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Related to stone drill: rock drill
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|Noun||1.||stone drill - a drill for penetrating rock |
cross bit - a rock drill having cruciform cutting edges; used in mining
drill - a tool with a sharp point and cutting edges for making holes in hard materials (usually rotating rapidly or by repeated blows)
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
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