Home / Standards / GB/T 3517-2022 GB/T 3517-2022 Active Rubber, raw natural—Determination of plasticity retention index(PRI) 天然生胶 塑性保持率(PRI)的测定 Standard Type GBT ICS 83.040.10 CCS B72 Status 现行 Issue Date 2022-10-12 Implementation 2022-10-12 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A