Home / Standards / GB/T 20056 GB/T 20056 Active Rolling bearings—Radial needle roller and cage assemblies—Boundary dimensions and tolerances 滚动轴承 向心滚针和保持架组件 外形尺寸和公差 Standard Type GBT ICS 21.100.20 CCS J11 Status 现行 Issue Date 2015-12-31 Implementation 2016-04-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会