Thaum muaj hluav taws xob poob siab, thaum lub sij hawm npaj kom muaj kev ruaj ntseg ntawm tus cawm seej, koj yuav tsum tau sim ua kom tau txais lub hwj chim tawm ntawm lub hwj huam sai sai, thiab tom qab ua tiav cov haujlwm kho hauv qab no.
(1) Tshem tawm cov khaub ncaws nrawm uas ua rau lub zog ua tsis taus pa.
(2) Kos lub qhov ncauj ntawm lub fais fab fais fab, ntxuav lub ntswg ntawm qhov ncauj kab noj hniav, thiab tshem tawm yog tias muaj hniav cem.
(3) Tam sim ntawd nqa tus cawm ntawm qhov chaw. Yog hais tias lub plawv nres nres los yog tsis muaj irregularly vibrating, lub siab ntawm lub hauv siab extrusion txujci tuaj yeem siv rau kev cawm. Nws yuav tsum tsis txhob cuam tshuam yam tsis tau ua rau, xws li ua pa tsis ua pa, siv qhov ncauj tawm ntawm qhov ncauj ua pa. Yog tias muaj ib tus neeg thib ob ntxiv rau tus cawm seej, koj yuav tsum ua raws li nram qab no: (1) Hu tus xov tooj xwm ceev: 120 (2) Muab cov cuab yeej thiab khoom siv rau kev pab thawj zaug. (3) Tso tawm cov neeg ua hauj lwm hauv tsev kawm ntawv.
(4) Xyuas kom meej tias muaj teeb pom kev zoo thiab huab cua ntawm thaj chaw. Kev tshawb nrhiav thiab kev txheeb xyuas tau qhia tias 90% ntawm kev kho yuav raug cawm tau yog tias kev kho mob pib 1 feeb tom qab hluav taws xob; yog tias txoj kev cawm rog pib 6 feeb tom qab hluav taws xob poob siab, tsuas yog 10% ntawm kev cawm ua kom rov tuaj; thiab 12 feeb tom qab fais fab tuag, tus cawm yuav pib. Kev txuag tau yog tsawg kawg nkaus. Yog li, thaum muaj ib tus neeg pom muaj hluav taws xob, lawv yuav tsum tawm tsam lub sij hawm thiab txais yuav tag nrho cov hau kev.