En iso 11127 - 4 preparation of steel substrates before application of paints and related products . test methods for non - metallic blast - cleaning abrasives . part 4 : assessment of hardness by a glass slide test 涂料及相关产品应用前钢基体的预处理.非金属喷砂清理磨料试验方法.第4部分:玻璃载片试验评估硬度
