Yazar
John J Pendergast
2 cilt bulundu.
Cilt sonuçları
Wet auger: respirable dust control for underground auger continuous mining machines
John J Pendergast · Mining Enforcement and Safety Administration
Sayfa sayısı yok · 1975
Mining machinery / Coal mines and mining / Dust control
Meeting mandatory federal health standards under difficult dust control conditions
John J Pendergast · U.S. Dept. of the Interior, Mining Enforcement and Safety Administration
28 sayfa · 1976
Mine dusts / Standards / Coal mines and mining / Dust control