1. Catalyst hom: Platinum, palladium, rhodium, thiab lwm yam hlau tseem ceeb thiab tsis tshua muaj ntiaj teb cov ntsiab lus ntawm cov compound catalyst.
2. Catalyst substrate: Honeycomb ceramic substrate, hlau substrate.
3. Cov txheej txheem zoo heev rau kev ua haujlwm ruaj khov, kav ntev thiab ruaj khov catalytic.
4. Cov txheej txheem thev naus laus zis thiab cov txheej txheem ntim khoom ua kom ntseeg tau tias thermal shock thiab mechanical stability.
5. Ntau yam, ua tiav cov lus qhia, cov neeg siv khoom xav tau thiab yuav ua raws li cov txheej txheem kev ua haujlwm kom haum raws li cov neeg xav tau sib txawv.
6. tuaj yeem ua tau raws li Euro3, Euro4, Euro5 lossis CARB, EPA tus qauv.