coal mine
【建】 煤的形成过程
coal forming process
暂无补充释义。
相关词条
wood coal
fine coal
coal washing
coal workers' pneumoconiosis
coal saw【矿】
coal dust firing (pulverized coal firing)
weak coal
coal forming process
暂无补充释义。
coal mine
wood coal
fine coal
coal washing
coal workers' pneumoconiosis
coal saw【矿】
coal dust firing (pulverized coal firing)
weak coal