Zobrazeno 1 - 3
of 3
pro vyhledávání: '"A. F. Tereshkin"'
Autor:
A. F. Tereshkin
Publikováno v:
Soviet Mining Science. 15:100-106
Publikováno v:
Soviet Mining Science. 12:129-133
The main group of mining systems for thick steeply dipping coal seams with stowage of the worked-out area, adopted recently in industrial trials in pits in the Kuznetsk coalfield, involves advance of the extraction front to the rise of the seam by me
Publikováno v:
Soviet Mining Science. 7:111-113