Home / Standards / QB/T 1134-1991 QB/T 1134-1991 Abolished 首饰银覆盖层厚度的测定方法化学法 Standard Type QB ICS N/A CCS N/A Status Abolished Issue Date 1991-06-03 Implementation 1992-01-01 Centralized Committee 轻工业部 Issuing Authority 轻工业部