1 lub cev ntawm lub cev huv, tshem av thiab obstacles ntawm lub cev.
2 Tshawb xyuas cov roj thiab cov khoom siv thiab cov khoom siv tswj ntawm lub chaw siv lubrication thiab ntxiv cov roj lubricating raws li yuav tsum tau ua.
3 ua ntej kev ua haujlwm ntawm txhua chav kawm, nyob rau hauv cov raj ntxig rau dej kom tsis pub 1 - rau 2 teev, thaum xyuas cov hlua thiab nres ntaus ntawv kev cia siab.
4 pob zeb tov ua haujlwm, yuav tsum saib xyuas lub cav, yuav tsum rov qab, kev sib tsoo tawm suab yog qhov qub, qhov kub kub siab dhau lawm,
5 Tom qab kawg ntawm txhua chav kawm haujlwm, yuav tsum ua tib zoo tu cov pob zeb tov tshuaj.
6 Yuav kom paub meej tias nws cov kev ua tau zoo, nyob rau hauv kev tswj ntawm transformation yuav tsum tau them sai sai rau tsis shoddy, yuav tsum siv high-quality bearings.
