- 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 ...                             
                                                     
                        Coal consisting of vitrain and durain with more or less minor clarain and minor fusain.    
    
    						Industry:Mining    
									Coal from which all stones and inferior coal have been picked out by hand; large lumps.    
    
    						Industry:Mining    
									Coal from which impurities have been removed mechanically without the use of liquid media.    
    
    						Industry:Mining    
									Coal having a weathering index, as defined by U.S. Bureau of Mines standards, of less than 5%.    
    
    						Industry:Mining