Home / Standards / GB/T 11855-2003 GB/T 11855-2003 Active Gauges of drill chuck tapers 钻夹圆锥量规 Standard Type GBT ICS N/A CCS J42 Status Active Issue Date 2003-11-10 Implementation 2004-06-01 Centralized Committee 中国机械工业联合会 Issuing Authority 中华人民共和国国家质量监督检验检疫总局