Home / Standards / GB/T 901-1988 GB/T 901-1988 Active Double end studs (clamping type)--Product grade B 等长双头螺柱 B级 Standard Type GBT ICS 21.060.10 CCS J13 Status 现行 Issue Date 1988-02-06 Implementation 1989-01-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A