Home / Standards / GB/T 3781.9-2019 GB/T 3781.9-2019 Abolished Acetylene black—Part 9:Determination of resistivity 乙炔炭黑 第9部分:电阻率的测定 Standard Type GBT ICS 83.040.20 CCS G49 Status 废止 Issue Date 2019-08-30 Implementation 2020-07-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A