Home / Standards / GB/T 21990-2008 GB/T 21990-2008 Active Polyvinyl chloride (PVC) pastes - Determination of fineness of grind 聚氯乙烯（PVC）糊 刮板细度的测定 Standard Type GBT ICS 83.080.20 CCS G32 Status 现行 Issue Date 2008-06-04 Implementation 2008-12-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A