Home / Standards / GB/T 31703-2015 GB/T 31703-2015 Active Ceramic ball bearings—Silicon nitride balls 陶瓷球轴承 氮化硅球 Standard Type GBT ICS 81.060.30 CCS Q32 Status 现行 Issue Date 2015-06-02 Implementation 2016-05-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A