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Some check in and out systems for coal mines

A million tons of anthracite mined without a fatality

Methane-indicating detectors prove dependable in sampling air in anthracite mines

Hazards of compressed-air jets for ventilating gassy mines

Published Year

• 1930-1939 (4)

Subject

• Coal mines and mining--Safety measures (4) *
• Anthracite coal (2)
• Mine safety (2)
• Mine ventilation (2)
• Compressed air (1)

Author

• Currie, R. D. (4) *
• Naus, L. L. (1)

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