grade of ore meaning in English

矿石品级
矿石品位

This machine can triturate wet or all kinds hard grade of ore and ofther material , especially can make many sizes sands
适用于湿法细碎，粗磨各种硬度的矿石及其他物料，特别适用于人工造沙过程中调节细度模数。
The computer program may assist decision - making in the way of helping decision - makers to select scientificaly the average grade of ore in pithead heap - leaching mining under a total cost
利用该经济评价模型开发的计算机软件，可以进行辅助决策，帮助决策人员科学地确定某一开发成本下坑口堆浸的矿石平均品位。