- 行业: Mining
 
- Number of terms: 33118
 
- Number of blossaries: 0
 
- Company Profile:
                        
 
  
                                                        The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...                             
                                                     
                        Pac. The undecomposed metallic ores, usually sulfides. Chiefly applied to auriferous pyrites. Concentrate and sulfide are preferable. An old syn. for sulfide. Obsolete.    
    
    						Industry:Mining    
									Packs built between gates with wastes on each side and usually supported by packwalls.    
    
    						Industry:Mining    
									Pairs of wheels used to support rods of a Cornish pump working on a slope.    
    
    						Industry:Mining    
									Pale green; NaC<sub>2</sub>H<sub>5</sub>OCSS ; molecular weight, 144.19; and soluble in water and in ethyl alcohol. An ore-flotation agent.    
    
    						Industry:Mining    
									Panning tin gravels in a half-calabash gourd. Used in prospecting and alluvial mining in primitive conditions.    
    
    						Industry:Mining    
									Paper (as litmus paper) cut usually in strips and saturated with an indicator or other reagent that changes color in testing for various substances.    
    
    						Industry:Mining    
									Paper impregnated with an extract of turmeric. Used as a test for alkaline substances, which turn it from yellow to reddish-brown, and for boric acid, which turns it red-brown.    
    
    						Industry:Mining    
									Paper spread with an explosive compound. It is rolled up for use in loading.    
    
    						Industry:Mining