Home / Standards / GB/T 5779.2 GB/T 5779.2 Active Fasteners--Surface discontinuities--Nuts 紧固件表面缺陷 螺母 Standard Type GBT ICS 21.060.20 CCS J13 Status 现行 Issue Date 2000-09-26 Implementation 2001-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会