Home / Standards / GB/T 20307-2006 GB/T 20307-2006 Active General rules for nanometer-scale length measurement by SEM 纳米级长度的扫描电镜测量方法通则 Standard Type GBT ICS 17.040;37.020 CCS N33 Status 现行 Issue Date 2006-07-19 Implementation 2007-02-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委