Home / Standards / GB/T 31351-2014 GB/T 31351-2014 Abolished Nondestructive test method for micropipe density of polished monocrystalline silicon carbide wafers 碳化硅单晶抛光片微管密度无损检测方法 Standard Type GBT ICS 77.040.99 CCS H26 Status 废止 Issue Date 2014-12-31 Implementation 2015-09-01 Responsible Dept 国家标准委 Drafting Unit N/A