短語詞組短語lean iron ore 貧鐵礦lean magnetite ore 貧磁鐵礦lean sulphide ore 貧硫化礦lean hematite ore beneficiation 貧赤鐵礦選礦lean copper ore 貧銅礦extremely lean iron ore 極貧鐵礦石lean manganese ore fines 貧礦錳礦粉lean manganese ore 化學(xué)二氧化錳Donganshan lean hematite ore 東鞍山貧赤鐵礦 返回 lean ore