Home / Standards / GB/T 271-1997 GB/T 271-1997 Abolished Rolling bearings--Classification 滚动轴承 分类 Standard Type GBT ICS 21.100.20 CCS J11 Status 废止 Issue Date 1997-07-25 Implementation 1998-02-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会