1. Ua ntej pib ua haujlwm, nws yog ib qho tsim nyog yuav tsum tau qhia meej txog qhov xwm txheej ntawm qhov chaw (qhov chaw, qhov xwm txheej ntawm hedges, qhov chaw ntawm cov teeb meem, kev phom sij nyob ib puag ncig, thiab lwm yam), thiab tshem tawm cov teeb meem uas tuaj yeem txav tau.
2. Nrog tus neeg teb xov tooj ua qhov chaw, nyob rau hauv ib lub vojvoog ntawm 15 meters yog qhov chaw txaus ntshai. Txhawm rau tiv thaiv lwm tus los ntawm kev nkag mus rau hauv cheeb tsam, cov hlua yuav tsum tau siv los thaiv thaj chaw lossis ib lub cim ntoo yuav tsum tau tsa ua lus ceeb toom. Tsis tas li ntawd, thaum ntau tus neeg ua haujlwm tib lub sijhawm, lawv yuav tsum tos txais txhua lub sijhawm thiab ua kom muaj kev nyab xeeb.
3. Ua ntej pib ua haujlwm, xyuas txhua qhov chaw ntawm lub tshuab lub cev kom zoo, thiab pib ua haujlwm tsuas yog tom qab lees paub tias tsis muaj qhov xoob, roj to, puas lossis deformation ntawm cov ntsia hlau. Tshwj xeeb tshaj yog cov khoom sib txuas yuav tsum tau kuaj xyuas kom zoo.
4. Nws tuaj yeem siv tau tom qab lees paub tias tsis muaj chipping, tawg, lossis khoov. Tsis tuaj yeem siv qhov txawv txav.
5. Thov siv polished ntse sawv daws yuav.
6. Txhawm rau tiv thaiv chipping thaum sib tsoo, nco ntsoov sau cov hauv paus hniav rau hauv arc.
7. Tom qab zawm cov ntsia hlau, ua ntej tig los ntawm tes los xyuas seb puas muaj lub viav vias nce thiab nqis lossis lub suab nrov txawv txav. Yog hais tias nws viav vias nce thiab nqis, nws yuav ua rau muaj kev vibration txawv txav los yog xoob ntawm qhov ruaj khov.