Home / Standards / GB/T 15590-2008 GB/T 15590-2008 Active Method of determining microlithotype composition 显微煤岩类型测定方法 Standard Type GBT ICS 73.040 CCS D26 Status 现行 Issue Date 2008-08-07 Implementation 2009-03-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A