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Hazards of the trolley-locomotive haulage system in coal mines
Hazards of black blasting powder in underground coal mining
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Published Year
1940-1949 (2)
Subject
Coal mines and mining--Safety measures (2) *
Explosives (1)
Mine explosions (1)
Mine haulage--Safety measures (1)
Mine railroads--Safety measures (1)
Author
Harrington, D. (2)
Warncke, R. G. (2) *
