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Topical Subjects
- Coal Mines and Mining--Mine Interiors--Machinery.[remove]19
- Coal mines and mining--West Virginia--Thomas.19
- Coal-mining machinery.13
- Conveying machinery.9
- Coal mines and mining--Equipment and supplies.4
- Drill presses.1
- Electric motors.1
- Hammers.1
- Hoisting machinery.1
- Mining machinery.1
- Saws.1