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Topical Subjects
- Coal Mines and Mining--Mine Interiors.[remove]38
- Coal mines and mining.27
- Coal miners.6
- Mine railroads.6
- Coal mines and mining--Equipment and supplies.5
- Coal-mining machinery.5
- Elevators.4
- Electricity in mining.3
- Mine gases--Measurement.3
- Coal mines and mining--Kentucky.2
- Mine roof bolting.2
- Shuttle cars (Mine haulage)2
- Coal mines and mining--Explosives.1
- Coal--Geology.1
- Coal-mining machinery--Maintenance and repair.1
- Conveying machinery.1
- Mine railroads--Cars.1
- Pumping machinery.1