筛选矿石 screened ore

难选矿石 [矿业] refractory ore

粗选矿石 milling ore

分选矿石用化学制品 chemical for the separation of ore

未选的矿石 raw ore ; crude ore

铀矿石选矿 dressing of uranium ore ; processing of uranium ores

矿石浮选促进剂 ore flotation promoter

铜矿石选矿 processing of copper ores

铁矿石选矿 processing of iron ores

蛭石选矿 processing of vermiculite ores