到无烟煤阶段,有机态微量元素含量进一步降低.The organic affinity of trace elements decreases further in anthracite.尤其是针对无烟煤, 采用离线型CDC分解炉更为合理.To anthracite, adopting off - line type CDC calciner is more reasonable.地下矿产资源丰富, 优质无烟煤探明储量约4OOO万吨.Un...
在两条道路的交叉点发生了一起事故.An accident happened at the meeting of two roads.每个交叉点上的一条边的长度和方位角是一开始就决定的.The length and azimuth of one side at each junction point is first decided on.在那两条街道的交叉点有一所邮局.There is a post office at the junc...