Home / Standards / GB/T 17955-2009 GB/T 17955-2009 Active Spherical bearings for bridges 桥梁球型支座 Standard Type GBT ICS 93.040 CCS P28 Status 现行 Issue Date 2009-03-31 Implementation 2009-11-01 Responsible Dept 交通运输部 Drafting Unit 交通运输部