Qhov txawv ntawm Rockwell hardness thiab Vickers hardness (4)
Lub rooj sib piv hardness
Raws li tus qauv German DIN 50150, cov lus hauv qab no piv cov tensile lub zog ntawm cov hlau nrog Vickers hardness, Brinell hardness thiab Rockwell hardness ntawm feem ntau siv ntau yam.
