Home / Standards / GB/T 24233-2009 GB/T 24233-2009 Active Manganese and chromium ores - Experimental methods for evaluation of quality variation and methods for checking the precision of sampling 锰矿石和铬矿石 评定品质波动和校核取样精密度的试验方法 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