eoal

常見例句

• opening up eoal seam in erosseut
  石門揭煤
• fully meehanized eoal mining with eaving of roof eoal
  綜放開采
• The First-line Production Worker's Efficiency Compensation Design in State-owned Eoal Enterprises
  國有煤炭企業(yè)一線員工效率薪酬設(shè)計
• top eoal eavability
  頂煤冒放性
• eoal bed
  煤層
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