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Highwall augering in Centre County, Pennsylvania
Use of 16-in. auger to mine coal lying under railroad; use of 26-in. McCarthy auger with hydraulic feed for mining 90-ft deep holes; practice of augering up to 158 ft.
Highwall augering in Centre County, Pennsylvania
Use of 16-in. auger to mine coal lying under railroad; use of 26-in. McCarthy auger with hydraulic feed for mining 90-ft deep holes; practice of augering up to 158 ft.
Highwall augering in Centre County, Pennsylvania
Coal Min
Coal Mining ; 31
1954
2 pages
Article (Journal)
English
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