Yazar
george n aul
1 cilt bulundu.
Cilt sonuçları
Grouting horizontal drainage holes in coalbeds
George N. Aul · Dept. of the Interior, Bureau of Mines
16 sayfa · 1979
Mine gases / Safety measures / Coal mines and mining / Methane
Yükleniyor
Yükleniyor
Yazar
1 cilt bulundu.
George N. Aul · Dept. of the Interior, Bureau of Mines
16 sayfa · 1979
Mine gases / Safety measures / Coal mines and mining / Methane