Home / Standards / GB/T 1631-1979 GB/T 1631-1979 Abolished Classification，designation and types of ion exchange resin 离子交换树脂分类、命名及型号 Standard Type GBT ICS 71.100 CCS G32 Status 废止 Issue Date 1979-09-15 Implementation 1980-01-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A