1, Muab ceg: thaum tsis siv ceg, nco ntsoov muab nws tso rau hauv txoj hauj lwm kom yog, txhawm rau xyuas kom txoj kev tsav tsheb ntawm tus ceg yuav tsis raug puas tsuaj, tab sis kuj yuav pab txhawb ntxiv rau kev siv ceg.
2, Hauv av tseem ruaj khov: tus ceg siv rau hauv qhov tsis muaj tsheb laij teb, yuav tsum tau khaws cov semi-trailer du, qhov yuav tsum tau xaiv ib qhov chaw ruaj khov. Yog tias muaj kev txwv rau lub vev xaib, lwm cov kev siv cov ntaub ntawv yuav siv, xws li ntau hauv lub log, ntoo, thiab lwm yam.
3, Iav ceev hloov: Semi-trailer thiab lwm yam kev siv ntawm lub tsheb tsav, qhov yuav tsum tau kho qhov sib txawv ceev ceev. Nws tseem muaj kev txwv nruj rau kev siv ob txhais ceg siv nyob rau hauv txawv iav ceev. Thaum tsis muaj cov khoom xa tuaj, tsis muaj kev txwv rau kev ceev ntawm nws cov chaw. Txawm li cas los xij, nqa cov khoom thauj, tshwj xeeb tshaj yog thaum nqa cov khoom hnyav hnyav heev, nws yog ib qho tsim nyog siv qeeb qeeb.
