Home / Standards / GB/T 24232-2009 GB/T 24232-2009 Active Manganese and chromium ores - Experimental methods for checking the bias of sampling and sample preparation 锰矿石和铬矿石 校核取样和制样偏差的试验方法 Standard Type GBT ICS 73.060.01 CCS D30 Status 现行 Issue Date 2009-07-15 Implementation 2010-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A