Home / Standards / GB/T 29517-2013 GB/T 29517-2013 Active Method for manual sample preparation of chrome ores in bulk 散装铬矿石手工制样方法 Standard Type GBT ICS 73.060.30 CCS D33 Status 现行 Issue Date 2013-05-09 Implementation 2014-02-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A