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Topical Subjects
- Coal Mines and Mining--Mine Interiors--Machinery.[remove]62
- Coal mines and mining.[remove]62
- Coal-mining machinery.29
- Coal miners.22
- Shuttle cars (Mine haulage)10
- Conveying machinery.7
- Mine timbering.7
- Coal-handling machinery.5
- Mine railroads--Cars.3
- Coal--Transportation.2
- Longwall mining.2
- Machine shops.2
- Mine railroads.2
- Mine roof bolting.2
- Donkeys.1
- Mine roof control.1
- Mine ventilation.1
- Mining machinery.1
- Power-plants.1
- Turbines.1