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- Coal Mines and Mining--Miners at Work.✖[remove]96
- Coal mines and mining.✖[remove]96
- Coal miners.86
- Coal-mining machinery.29
- Loaders (Machines)10
- Mine gases--Measurement.7
- Mine railroads.7
- Mine roof bolting.7
- Shuttle cars (Mine haulage)7
- Boring.5
- Consolidation Coal Company. Jamison Mine no. 9.15
- Stonega Coke and Coal Company.4
- Consolidation Coal Company. Mine no. 32.3
- Consolidation Coal Company. Bishop Mine.2
- Consolidation Coal Company. Cavalier Mine no. 206.2
- Consolidation Coal Company. Pursglove Mine no. 15.2
- Consolidation Coal Company.1
- Consolidation Coal Company. Mine no. 63.1
- Consolidation Coal Company. Ohio Mine.1
- Continental Coal Company. Brock Mine no. 4.1
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