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1. Miners Operate a Drilling Machine in an Unidentified Mine

2. Miner Operates a Drilling Machine in an Unidentified Mine

3. Miner Operates a Drilling Machine in an Unidentified Mine

4. Miners Operate a Drilling Machine in an Unidentified Mine

5. Miners Operate a Drilling Machine in an Unidentified Mine

6. Miners Operate a Drilling Machine in an Unidentified Mine

Coal miners push a large machine on tracks in an unknown mine likely in West Virginia.

7. Miners Push a Mining Machine Along Tracks in an Unknown Mine