Home / Standards / GB/T 39821-2021 GB/T 39821-2021 Active Plastics—Determination of apparent density of moulding material that cannot be poured from a specified funnel 塑料 不能从规定漏斗流出的模塑材料表观密度的测定 Standard Type GBT ICS 83.080.10 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