The internal combustion rock drill is a handheld rock drilling tool that is composed of a small gasoline engine, an air compressor, and a rock drill. A rock drill is a tool used to directly mine stone.
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[pdf] Electric generators powered by large diesel engines (the prime movers) generate electricity that move the heavy rig equipment such as the rotary table (or top drive), mud pumps and drawworks. Electric drill rigs are more expensive than mechanical rigs, but offer some nice advantages in return.
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