Home / Standards / YB/T 917-1997 YB/T 917-1997 Abolished 炭素材料钒的比色测定 Standard Type YB ICS N/A CCS N/A Status Abolished Issue Date 1997-02-19 Implementation 1997-07-01 Centralized Committee 冶金工业部 Issuing Authority 冶金工业部