Methods of directed drilling of boreholes through seams of coal and oil shale
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KeywordsShale Drilling Coal Seam Anthracite Plumb Line
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- 1.Sixth All-Union Scientific-Technical Conference on Countermeasures against Gas Bursts [in Russian], in: Bezopasnost' Truday Promyshlennosti, No. 9 (1972).Google Scholar
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© Plenum Publishing Corporation 1975