Clemen Hardness Test Pencil Model 318 Model 318 C 表面耐划性,划痕笔据克莱门说,3 种力范围,最高 20 N Test tip acc. to Clemen (R 1.0 mm) 1,0 mm radius, short shaft with flat clamping area SCRATCH HARDNESS TESTER 413 SCRATCH HARDNESS TESTER 413 表面划痕测试仪,极其精细分级(0.01 N 每级),各种划痕笔