1. Welders yuav tsum tau hla dhau kev cob qhia nruj, thiab lub laser tsis tuaj yeem tsoo tib neeg lossis cov khoom nyob ib puag ncig, txwv tsis pub nws yuav ua rau kub nyhiab thiab tseem ua rau hluav taws;
2. Txawm hais tias tus txheej txheem welding yog ntsib qhov chaw ua haujlwm, nws yuav tsim lub teeb pom kev zoo ntawm lub ntsej muag, yog li tus neeg teb xov tooj yuav tsum muaj lub ntsej muag tshwj xeeb tiv thaiv lub teeb npog qhov muag.
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