Hoʻolako ʻia ka Digital Rockwell Hardness Tester me kahi pale hōʻike nui hou i hoʻolālā ʻia me ka hilinaʻi maikaʻi, ka hana maikaʻi a me ka nānā maʻalahi, no laila he huahana ʻenehana kiʻekiʻe e hui pū ana i nā hiʻohiʻona mechanic a me ka uila.
