Home / Standards / GB/T 28397-2012 GB/T 28397-2012 Active Evaluation indexes and computation of circular economy for coal mining area 煤炭矿区循环经济评价指标及计算方法 Standard Type GBT ICS 73.040 CCS D20 Status 现行 Issue Date 2012-06-29 Implementation 2012-10-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A