Lub ntsiab tseem ceeb ntawm cov khoom roj hmab:
Cov khoom siv roj hmab tuaj yeem muab faib ua peb yam zoo li cov khoom siv roj hmab (cov pob dawb), cov pob silicone, thiab cov pob mos txwv ntawm cov khoom siv.
1. Cov khoom siv roj hmab zoo nkauj tau tsim los ntawm cov roj hmab ntuj thiab yog siv rau kev tshuaj xyuas cov khoom siv zoo tib yam ntawm lub vijtsam vibrating.
2. Cov roj hmab silicone roj hmab muaj qhov zoo ntawm zoo elasticity, hnav tsis kam, siab kub tsis kam thiab tsis yooj yim poob. Lawv yog cov tsim nyog rau kev tshuaj xyuas cov khoom hauv kev lag luam uas xav tau kev huv huv ntau yam xws li zaub mov, tshuaj, thiab kev lag luam chemical.
3. Lub pob mos txwv yog ua los ntawm cov khoom siv sib xyaw thiab muaj cov yam ntxwv ntawm cov khoom tsis muaj tawv elasticity, hnav tsis kam thiab rov siv dua.
Cov roj hmab roj ua zoo zoo, yog ib puag ncig zoo, muaj qhov zoo tshaj plaws sealing nyhuv, tiv tshav kub, laus tiv taus, kub tsis kam, kub tsis kam, ua haujlwm zoo rwb thaiv tsev, corrosion tsis kam, roj tsis kam, thiab dej tsis kam. Zoo rwb thaiv tsev thiab muaj zog resilience.
