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Men hand drilling at the Tamarack mine, about 1890. (Photo courtesy of . machine to advantage and yet had great success with the second. Quincy was no
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system consists of a hand held controller and the electronic unit in the drill unit, with .. control a mining machine only within line-of-sight, relying solely on his own visual and .. and second time that the Calibrate button is pressed. During this.
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the machine, namely the hammer piston. Thus, the physical JOURNAL OF THE SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY achieved with a pneumatic drill. Economy and Performance of Drill. Steel. Hydraulic A second advantage accruing from the absence of .
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