Yazar
Wallace W Roepke
9 cilt bulundu.
Wallace W. Roepke · U.S. Dept. of the Interior, Bureau of Mines
26 sayfa · 1983
Coal-cutting machinery / Coal mines and mining / Testing / Twin Cities Research Center (United States. Bureau of Mines) / Research
Wallace W Roepke · Bureau of Mines, U.S. Dept. of the Interior
Sayfa sayısı yok · 1983
Equipment and supplies / Coal mines and mining / Carbide cutting tools
Wallace W. Roepke · U.S. Dept. of the Interior, Bureau of Mines
24 sayfa · 1983
Coal mines and mining / Coal-cutting bits / Mine dusts / Testing
Wallace W. Roepke · United States Dept. of the Interior, Bureau of Mines
30 sayfa · 1985
Coal mines and mining / Coal-mining machinery / Computer programs / Dust control
Wallace W. Roepke · U.S. Dept. of the Interior, Bureau of Mines
30 sayfa · 1983
Drag bits (Drilling and boring) / Industrial Diamonds / Testing
Wallace W. Roepke · U.S. Dept. of the Interior, Bureau of Mines
16 sayfa · 1983
Coal mines and mining / Coal-cutting bits / Coal-mining machinery / Dust control / Mechanical wear
Wallace W. Roepke · U.S. Dept. of the Interior, Bureau of Mines
14 sayfa · 1985
Coal mines and mining / Coal-cutting bits / Dust control / Testing / Water
Wallace W. Roepke · U.S. Dept. of the Interior, Bureau of Mines
31 sayfa · 1983
Coal-cutting bits / Testing
Wallace W. Roepke · Bureau of Mines
53 sayfa · 1976
Coal mines and mining / Coal-mining machinery / Dust control