Home / Standards / GB/T 31313-2014 GB/T 31313-2014 Active Fluorspas—Determination of particle size distribution by sieving 萤石 粒度的筛分测定 Standard Type GBT ICS 73.080 CCS D52 Status 现行 Issue Date 2014-12-05 Implementation 2015-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A