Yazar
r o lance
2 cilt bulundu.
Cilt sonuçları
Longwall Gate Road Stability in Four Deep Western U.S. Coal Mines (Information Circular)
Lance R. Barron, Matthew J. Demarco, R. O. Kneisley · United States Dept of Interior
Sayfa sayısı yok · 1994
Ground control (Mining) / Longwall mining / Utah

