矿石取样 meaning in Chinese

ore sampling
ore screenings

Method of sampling and sample preparation of manganeseores in bulk
散装锰矿石取样制样方法
Method of sampling and sample preparation of manganese ores in bulk
散装锰矿石取样制样方法
Methods of sampling and sample preparation of antimony ores in bags
袋装锑矿石取样制样方法
Method for samplling and sample preparationof chrome ores in bulk for import
进口散装铬矿石取样制样方法