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irving hartmann
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Recent rock-dusting experiments for arresting coal-mine explosions
Irving Hartmann · U.S. Dept. of the Interior, Bureau of Mines
16 sayfa · 1950
Coal mines and mining / Dust control / Mine explosions / Prevention
Pressure-relieving capacities of diaphragms and other devices for venting dust explosions
John Nagy, J. E. Zellinger, Irving Hartmann, United States. Bureau of Mines · The Bureau.
15 sayfa · 1950
Dust explosions / Mine dusts / Pressure / Measurement