Manless extraction of coal in composite seams

Manless extraction of coal in composite seams

A. E. Gontov, A. P. Shirokov, P. M. Kovachevich
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Volume:
16
Language:
english
Pages:
7
DOI:
10.1007/bf02499749
Date:
March, 1980
File:
PDF, 534 KB
english, 1980
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