1) Nqa lub tsheb nrog lub log khoom ntaiv. Lub sijhawm no, cov saw yog ib txwm pib poob. Siv tus pas kom txhawb nqa qhov qis tshaj ntawm cov saw hlau kom txog thaum nws rub tsis tau. Txheeb xyuas seb qhov saw puas xoob raws li qhov kev ncua deb. Lifting 2 cm yog dab tsi, thiab nqa 2 cm lossis ntau dua yog xoob. Qhov kev hloov kho, yog tias tsawg tshaj li ob centimeters, nruj thiab yuav tsum tau kho.
2) Thaum xav tau kev hloov kho, xoob lub hau ntswj nrawm ntawm lub nraub qaum (tuaj yeem rub tawm tsis tas hle). Yog tias cov saw xoob xoob, txav mus rau tom qab lub log rov qab. Thaum nws nruj, mus tom ntej. Ua tib zoo saib rau ntawm sag ntawm txoj saw hlau. Yog nws ib txwm, ces ua kom nruj ntsia hlau. Nws tseem yuav tsum tau sau tseg tias lub log rear yuav tsum ceev cia txoj hauv kev ncaj nrog lub log pem hauv ntej. Nws tsis yog yuav tsum tau pw hauv av. Muaj cov nplai ntawm ob sab ntawm sab nraub qaum rocker. Khaws ob tog tog txhua txoj kev. Cov nplai tuaj yeem nruj ntawm lub log tsheb. Saib, (koj tsis tuaj yeem pom tias koj yuav tsum tau ntxuav lub tsheb, haha), uas yog nws, yooj yim heev.
