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Comparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal
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Published Year
1980-1989 (1)
Subject
Boring (1) *
Coalbed methane drainage--Pennsylvania (1)
Mine ventilation (1)
Author
Finfinger, Gerald L. (1)
Kravits, S. J. (1)
Sainato, Albert. (1) *
