1. Nquag kuaj xyuas cov xwm txheej ntawm lub twj tso kua mis, suav nrog seb puas yog qhov ceev, kub, siab thiab lwm yam tsis yog ib txwm muaj.
2. Tshawb xyuas kev sib khi ua tau zoo ntawm lub twj tso kua mis kom ntseeg tau tias tsis muaj xau.
3. Xyuas cov kabmob me me kom ntseeg tau tias cov kabmob tau zoo lubricated.
4. Tshawb xyuas cov inlet thiab qhov hluav taws xob qub ntawm cov twj tso kua mis kom ntseeg tau tias lawv tau qhib thiab kaw ib txwm.
