Home / Standards / GB/T 10920 GB/T 10920 Active Types and dimensions of screw thread gauge and plain limit gauge 螺纹量规和光滑极限量规 型式与尺寸 Standard Type GBT ICS 17.040.30 CCS J42 Status 现行 Issue Date 2008-11-12 Implementation 2009-05-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会