Dej nyab lub hardness yog ntsuas tawv ntawm cov khoom siv kho kom zoo. Softer cov khoom lag luam yog nyob ntawm ntug dej ib qho nplai, whereas cov ntaub ntawv nyuaj nyob ntawm ntug dej D thiab Rockwell nplai. Feem ntau cov epoxies thiab polyurethanes poob rau hauv ntug dej ib lossis ntug dej D ntau li nrog qee qhov nyob rau hauv qhov tsawg kawg ntawm kev ntsuas foob pob zeb. Qee cov ntawv thov, xws li chais, yuav tsum tau kho kom meej ntawm kev kho kom tawv.
Koj puas tau xav txog dab tsi ntawm ntug dej nyuaj txhais tau tias ntawm cov khoom muab? Siv peb phau ntawv qhia hauv qab no los pab koj ntsuas lub hardness ntawm cov khoom koj tab tom tshawb nrhiav.
