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1. Txheeb xyuas seb qhov hluav taws xob ntawm cov pa oxygen ua ntej thiab tom qab peb txoj kev hloov pauv catalytic zoo ib yam. Yog tias lawv zoo ib yam, nws txhais tau tias peb txoj kev hloov pauv catalytic tau puas, uas yog, nws raug thaiv lossis peb txoj kev hloov pauv catalytic raug hlawv vim yog lub cav'
2. Ncav mus rau lub raj tso pa kom pom tias koj tuaj yeem hnov cov pa nkag mus. Yog tias koj tuaj yeem' tsis hnov nws, nws txhais tau tias txhaws;
3. Tshem tawm lub tshuab lim cua thiab nqis tes rau lub nrawm ntawm qhov chaw kom pom tias cov pa luam yeeb dub tawm los ntawm lub lim cua. Yog tias yog, nws yuav raug thaiv;
4. Hnov qhov sib txawv ntawm qhov kub thiab txias ntawm peb-txoj kev catalytic converter los txiav txim seb nws puas raug thaiv. Qhov sib txawv ntawm qhov kub loj qhia tau tias nws raug thaiv;
5.Qhov siab tshaj plaws tsis tuaj txog thaum lub sijhawm sim tsav, thiab kev nrawm nrawm tsis zoo, uas tseem yog qhov ua tau tshwm sim ntawm kev thaiv ntawm peb txoj kev catalytic converter;
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