ore sample [矿物] 矿样

gold ore sample 矿样

Ore sample equipment 矿石样品设备

Au-Ag ore sample 金银矿样

Ore Sample Standard Method 矿样标准法

representative of ore sample 矿样代表性

polymetal ore standard sample 多金属矿标准样品

cylindrical sample of ore 矿石圆柱样

ore sample decomposition 矿样分解