Frictional Ignition of Gas by Mining Machines Irving Hartmann Published: 1955 Total Pages: 26 Get eBook
Frictional Ignition of Methane by Continuous Mining Machines in Underground Coal Mines Edward M. Kawenski Published: 1979 Total Pages: 18 Get eBook
Frictional Ignition with Coal Mining Bits Welby G. Courtney Published: 1990 Total Pages: 36 Get eBook
Frictional Ignition of Natural Gas-air Mixtures by Alternative Coal-cutter Bit Shank Materials L. Garner McDonald Published: 1992 Total Pages: 24 Get eBook
Testing of Coal-cutter Materials for Incendivity and Radiance of Sparks Published: 1972 Total Pages: 42 Get eBook
Rock Dusting and Sampling Including Wet Rock Dusting at the Bureau of Mines Experimental Coal Mine Irving Hartmann Published: 1956 Total Pages: 22 Get eBook
