ground coal meaning in English
煤层底部煤
Examples
- Standard classification for rubber compounding materials - ground coal
橡胶配料的标准分类.底煤 - Unloading point gas control technology for ground coal bunker in chengzhuang mine
成庄矿地面储煤仓装卸口瓦斯治理技术 - Development of the hanger of the monorail hoist runway on the ground coal road with the total bolt support
全锚支护的底煤巷单轨吊车道吊具的研制