Yazar
s j kravits
3 cilt bulundu.
Cilt sonuçları
In-mine test of the Bureau of Mines preproduction wireless survey system
S. J. Kravits · U.S. Dept. of the Interior, Bureau of Mines
22 sayfa · 1990
Boring / Coalbed methane drainage / Directional drilling
Comparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal
S. J. Kravits · U.S. Dept. of the Interior, Bureau of Mines
31 sayfa · 1985
Boring / Coalbed methane drainage / Mine ventilation