Home / Standards / GB/T 30731-2014 GB/T 30731-2014 Active Specifications of combined equipment for coal sample preparation 煤炭联合制样系统技术条件 Standard Type GBT ICS 73.040 CCS D21 Status 现行 Issue Date 2014-03-27 Implementation 2014-10-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A