Home / Standards / GB/T 474-2008 GB/T 474-2008 Active Method for preparation of coal sample 煤样的制备方法 Standard Type GBT ICS 73.040 CCS D21 Status 现行 Issue Date 2008-12-04 Implementation 2009-05-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A