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Coal miners push a large machine on tracks in an unknown mine likely in West Virginia.
A photograph of a piece of mining and/or railroad equipment.
Mechanic working on what appears to be a turbine.
Close view of an electric motor at a coal mine site in Thomas, W. Va.
Continuous miner in action.
A continuous mining machine operating in a four foot seam.
Two men standing next to a continuous mining machine.
Man operating a JMC1 continuous miner.
Picture drawn by Roger Zitko showing new face roof bolter on a continuous miner.
A large Marietta Miner Continuous Mining Machine.
The National Mine Service Company granted an exclusive world-wide license to manufacture and sell a new type of shuttle car developed and patented by Pittsburgh Consolidation Coal Company.  The shuttle car was designed by Arthur L. Lee and his engineering staff of Pitt-Consol.
Coal loaders sit outside the Joy Manufacturing Factory.  Caption on photo reads, 'Mine equipment suppliers are busy turning out machinery for mechanical mining. For example, Joy Mfg. recently went on double shift operation to speed up production of mining machinery.'
Joy executives stand beside a continuous mining machine.
An electric shuttle car sits in a warehouse yard.
A continuous miner, model 2BT-2 Twin Borer, sits on display.
A continuous mining machine sits above ground in the yard of Lee-Norse Company Warehouses.
A Joy Manufacturing Co. Continuous Mining Machine. ML 5196 DIO57.
A Continuous Mining Machine on display above ground.