Home / Standards / GB/T 39516-2020 GB/T 39516-2020 Active Micro nano standard samples(geometric) 微纳米标准样板(几何量) Standard Type GBT ICS 17.040.30 CCS J42 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A