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2 results returnedComparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal
Determining the source of longwall gob gas :Lower Kittanning Coalbed, Cambria County, PA
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Subject
- Mine ventilation (2) *
- Boring (1)
- Coal mine waste--Pennsylvania--Cambria County (1)
- Coalbed methane drainage--Pennsylvania (1)
- Firedamp--Pennsylvania--Cambria County (1)
- Longwall mining--Pennsylvania--Cambria County (1)
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