Home / Standards / GB/T 6949-2010 GB/T 6949-2010 Active Determination of apparent relative density of coal 煤的视相对密度测定方法 Standard Type GBT ICS 73.040 CCS D21 Status 现行 Issue Date 2011-01-10 Implementation 2011-06-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A