Yazar
h p greenwald
2 cilt bulundu.
Cilt sonuçları
Coal-dust explosibility factors indicated by experimental mine investigations 1911 to 1929
George S. Rice, H. P. Greenwald · U. S. Govt. print. off.
45 sayfa · 1929
Mine explosions / Coal mines and mining / Safety measures
Experiments to determine the minimum amount of coal-dust required for propagation of a mine explosion
George Samuel Rice, H. P. Greenwald, United States. Bureau of Mines · The Bureau
Sayfa sayısı yok · 1931
Mineral dusts / Mine explosions