There seems no ideal method to mine medium grade, gentle dip and medium thickness orebody.

对于矿石价值中等、品位中等的缓倾斜中厚矿体，目前无理想的采矿方法。

youdao

There seems no ideal method to mine medium grade, gentle dip and medium thickness orebody.

对于矿石价值中等、品位中等的缓倾斜中厚矿体，目前无理想的采矿方法。

youdao