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A summary of practical experience with powered supports and equipment in level seams in the Kuznetsk coalfield
A. K. Kovrizhin, V. V. Angarskii, N. N. DmitrienkoVolume:
1
Language:
english
Pages:
8
DOI:
10.1007/bf02501845
Date:
November, 1965
File:
PDF, 584 KB
english, 1965