ʻO nā ho'āʻo paʻakikī maʻamau: Rockwell Hardness (HR), Surface Rockwell Hardness (HR), Vickers Hardness (HV), Micro Vickers Hardness (HV), Knoop Hardness (HK), Brinell Hardness (HB) , Leeb hardness (HL) (rebound). ʻano hana), hoʻāʻo paʻakikī kani ultrasonic (UCI), paʻakikī kahakai (SHORE).https://www.yukeriv...
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