Hauv cov txheej txheem ntawm kev siv cov khoom siv yas hose ntau lawm, cov txheej txheem txheej txheem muaj kev cuam tshuam thiab cuam tshuam. Txhawm rau kom ntseeg tau tias qhov kev ua tau zoo ntawm cov khoom lag luam thiab cov khoom lag luam zoo, nws yog qhov yuav tsum tau kho cov txheej txheem tsis raws sijhawm. Cov ntsiab lus ua haujlwm hauv qab no yuav tsum tau ua tiav hauv kev tsim khoom, cia peb nkag siab lawv ua ke.
Dab tsi koj yuav tsum tau them sai sai rau thaum ua haujlwm cov khoom siv yas hose ntau lawm
1. Tus neeg teb xov tooj yuav tsum paub txog kev molding thiab kev ua haujlwm ntawm cov khoom siv yas hose ntau lawm.
2. Yas hose cov cuab yeej tsim khoom lag luam tau hais tias qhov kub, ceev thiab yaj siab ntawm lub tshuab yuav tsum tau tswj.
3. Nws tseem tsim nyog los tswj cov phab ntsa tuab thiab zoo ntawm cov yas hose kom ntseeg tau tias cov khoom tsim tau tsim nyog.
4. Txhawm rau kom txo qis qhov hnyav ntawm parison, raws li kev tso cai, qhov ceev ntawm cov khoom siv yas hose tuaj yeem ua kom nrawm dua thiab lub sijhawm tos ntawm cov yas hose yuav luv.
