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Schemes for development of gently dipping seams, not requiring disassembly of hydraulic systems
P. M. Kovachevich, V. P. Ptitsin, F. K. Prusakov, G. I. YakimovVolume:
10
Language:
english
Pages:
3
DOI:
10.1007/bf02501449
Date:
July, 1974
File:
PDF, 183 KB
english, 1974