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- Coal Mines and Mining--Miners at Work.โ[remove]16
- Coal miners.16
- Coal mines and mining.15
- Coal-mining machinery.6
- Boring.2
- Loaders (Machines)2
- Mine railroads.2
- Mine roof bolting.2
- Coal mines and mining--Explosives.1
- Electricity in mining.1
- Consolidation Coal Company. Jamison Mine no. 9.โ[remove]16
- Stonega Coke and Coal Company.4
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