Home / Standards / GB/T 1720-2020 GB/T 1720-2020 Active Circle-drawing test of coating films 漆膜划圈试验 Standard Type GBT ICS 87.040 CCS G50 Status 现行 Issue Date 2020-11-19 Implementation 2021-10-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A