Home / Standards / GB/T 44355-2024 GB/T 44355-2024 Active Automatic determination of maceral group composition in coal —Image analysis method 煤的显微组分组含量自动测定 图像分析法 Standard Type GBT ICS 73.040 CCS D26 Status 现行 Issue Date 2024-08-23 Implementation 2025-03-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A