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Rock drill   /rɑk drɪl/   Listen
Rock drill

noun
1.
A drill for penetrating rock.  Synonyms: bore bit, borer, stone drill.





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"Rock drill" Quotes from Famous Books



... for many years the engineer of the Ingersoll Rock Drill Co., and hence thoroughly familiar with modern quarrying practice, read a paper before the last meeting of the American Society of Civil Engineers on the above subject, containing many interesting points, given in the Engineering ...
— Scientific American Supplement, No. 832, December 12, 1891 • Various


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