Home / Standards / MH/T 3020-2011 MH/T 3020-2011 Abolished 金属硬度标尺的转换 Standard Type MH ICS N/A CCS N/A Status Abolished Issue Date 2011-03-01 Implementation 2011-06-01 Centralized Committee 中国民用航空局 Issuing Authority 中国民用航空局