Rooj tog saum npoo tsis kam rau cov kua txias, qhuav thiab ntub cua sov tester

1.Cold resistance test: 1) Preparation of specimen 2) Application of test solution 3) Qhuav qhov chaw xeem 4) Test piece inspection 5) Kev ntsuam xyuas 6) Sau daim ntawv xeem

2.Dry heat resistance test: 1) specimen npaj, 2) cua sov qhov chaw, 3) humid heating test surface, 4) drying test surface, 5) specimen inspection, 6) result assessment, 7) sau ntawv xeem;

3.Damp heat resistance test: 1) specimen npaj, 2) heating source, 3) humid heating test surface, 4) drying test surface, 5) specimen inspection, 6) result assessment, 7) sau ntawv xeem.