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Lignite

The brown lignite coal is the softest coal.


  • Underground mining is a dangerous occupation. - 2753
  Key words: Brown-Coal, Coal, Lignite, Mining  


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Mine Safety and Health Administration
 Mine Safety and Health Administration

msha.gov - 645
National Mining Association
 National Mining Association

 Resources Mining organizations and trade associations. NMA member companies.

nma.org - 646
SPG Media PLC
 SPG Media PLC

 Mining, Tunneling, and Quarrying.

mining-technology.com - 647



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