23 pages matching developments in coal in this book
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Spectra of solar radiation a cap lamp and hot metal
l3 Experimental linch scoop for sampling mine dusts
1 other sections not shown
2-foot-diameter 3-inch wind tunnel 6-foot explosion tunnel 6-foot-diameter explosion tunnel air velocities airflow ammonium phosphate Bureau of Mines cap lamp carbon dioxide carbon monoxide Cardox-Purple-K coal and rock coal dust clouds coal dust explosions coal mine fire cryolite detect and quench detector developments in coal device driver section dust deposits electrical circuit equipment Experimental experiments explosion extinguishants EXPLOSION PREVENTION RESEARCH extinguishing agent extinguishing system face area fire and explosion fireball flame speed float coal dust floor ft/sec gas explosion Grumer Halon 1301 spray Halon l30l Hazleton inches in diameter incipient fires early incombustibles Indicating relative efficacy intrinsic safety lift coal lift dusts lobes methane explosion Mining and Safety Monnex passive barrier Pittsburgh Mining PMSRC potassium bicarbonate presently employed radiation Recent developments rock dust Safety Research Center samples semicylinder shown in figure solar radiation tion tunnel cross section tunnel is shown Velocities to lift vention research Weight-percentages1