Zobrazeno 1 - 3
of 3
pro vyhledávání: '"B A, Tregubov"'
Publikováno v:
Soviet Mining Science. 17:532-538
1. The best material for stemming is hard rock chips, with coarseness 3–10 mm. 2. The length of stemming, such that it is not ejected from the borehole, amounts to 140–150 r0, but its length can be reduced somewhat, as even in the case of ejectio
Publikováno v:
Soviet Mining Science. 7:416-420
Publikováno v:
Gigiena i sanitariia. (12)