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Design and development of drill equipment
Gas migration characteristics of coalbeds
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Published Year
1960-1969 (2)
Subject
Coal mines and mining (2)
Boring machinery (1)
Methane (1)
Mine gases (1)
Mine ventilation (1)
Author
Hadden, J. D. (2) *
Cervik, Joseph, (1)
Sainato, Albert, (1)
