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alexander d prokop
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A Method to Measure Gas Levels During Auger Mining of Coal (Information Circular / Bureau of Mines)
J. C. Volkwein, Alexander D. Prokop · Yayınevi bilinmiyor
Sayfa sayısı yok
Coal augers / Coal mines and mining / Measurement / Mine gases / Safety measures
A Method to Measure Gas Levels During Auger Mining of Coal (Information Circular / Bureau of Mines)
J. C. Volkwein, Alexander D. Prokop · Yayınevi bilinmiyor
Sayfa sayısı yok
Coal augers / Coal mines and mining / Measurement / Mine gases / Safety measures