1. Welders yuav tsum hnav khaub ncaws raws li kev ruaj ntseg
2. Cov cuab yeej siv los ntawm welders yuav tsum tau ntim rau hauv lub hnab ntim khoom.
3. Muaj kev ruaj ntseg tiv thaiv scalding ntsuas ntawm qhov chaw ntawm lub tshuab hluav taws xob.
4. Lub erection ntawm high-altitude kev khiav hauj lwm yuav tsum ua raws li cov kev cai ntawm kev nyab xeeb, thiab qhov chaw yuav tsum haum rau vuam kev khiav hauj lwm.
5. Lub thawv hluav taws xob cov cuab yeej sib txuas yuav tsum muaj cov cuab yeej tiv thaiv kev xau.
6. Hnav cov iav tiv thaiv thaum siv lub tshuab sib tsoo.
