Home / Standards / GB/T 39978-2021 GB/T 39978-2021 Active Nanotechnology—Resistivity of carbon nanotube powder—Four probe method 纳米技术 碳纳米管粉体电阻率 四探针法 Standard Type GBT ICS 59.100.20 CCS G13 Status 现行 Issue Date 2021-05-21 Implementation 2021-12-01 Responsible Dept 中国科学院 Drafting Unit N/A