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Development of an Underground Automated …Development of an Underground Automated Thin-Seam Coal Mining Method Darren W. Holman (ABSTRACT) It is predicted that coal mining in Southwest ia, and the ...
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Patent US2967701 - Method of continuous …Jan. 10, 1961 A. G. WILCOX METHOD OF CONTINUOUS LOW SEAM SHORT WALL MINING USING ROTARY AUGER CUTTERS Original Filed May 6, 1957 7 Sheets …
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