Home / Standards / GB/T 13449-1992 GB/T 13449-1992 Abolished Gold lump ores--Increment sampling and sample preparation--Manual method 金块矿取样和制样方法 手工方法 Standard Type GBT ICS 73.060 CCS D46 Status 废止 Issue Date 1992-04-24 Implementation 1992-12-01 Responsible Dept 中国有色金属工业协会 Drafting Unit N/A