Home / Standards / GB/T 39812-2021 GB/T 39812-2021 Active Plastics—Preparation of test specimens by machining 塑料 试样的机加工制备 Standard Type GBT ICS 83.080.01 CCS G31 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A