l He pumau me te roa, he pai te whakamatautau;
l HRA, HRB, HRC tauine ka taea te korero tika mai i te ine;
l He whiringa mo etahi atu tauine Rockwell
(HRD,HRF,HRG,HRH,HRE,HRK,HRL,HRM,HRP,HRR,HRS,HRV)
l Whakatauhia te pehanga hinu hinu, ka taea te whakatika i te tere o te uta;
l Te tukanga whakamatautau a-ringa, kaore he hiahia mo te whakahaere hiko;
l He pumau me te pono mo te whakamatautau i te mata kopiko;
l Ka rite ki nga Paerewa o GB/T 230.2, ISO 6508-2 me ASTM E18；
