Underground Roof Bolter
cults3d
The Roof Bolter: A machine designed to put steel bolts several feet long into the roof of a mine. These bolts lock the weaker layers of rock together and anchor it into a stronger layer such as limestone to keep it from falling on the miner's head. Prints 100% supportless! The canopies, wheels and fit inside the precut holes on the bolter body.
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