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Incombustible required on floor and on rib-roof surfaces of coal mines to prevent propagation of explosions
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Published Year
1950-1959 (1)
Subject
Coal mines and mining--Dust control (1)
Dust explosions--Prevention (1) *
Mine explosions--Prevention (1)
Author
Christofel, F. P. (1)
Hartmann, Irving. (1) *
Nagy, John. (1)
