Home / Standards / GB/T 12778-2008 GB/T 12778-2008 Abolished Determination of charpy impact fracture surface for metallic materials 金属夏比冲击断口测定方法 Standard Type GBT ICS 77.040.10 CCS H22 Status 废止 Issue Date 2008-02-01 Implementation 2008-07-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委