eoal
常见例句
- opening up eoal seam in erosseut
石門揭煤 - fully meehanized eoal mining with eaving of roof eoal
綜放開採 - The First-line Production Worker's Efficiency Compensation Design in State-owned Eoal Enterprises
國有煤炭企業一線員工傚率薪酧設計 - top eoal eavability
頂煤冒放性 - eoal bed
煤層 返回 eoal