-America, Canada- cTUVus&ETL
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North America - cTUVus&ETL
▍ Taw Qhia Lub Chaw Haujlwm Saib Xyuas Kev Nyab Xeeb thiab Kev Noj Qab Haus Huv (OSHA) nyob rau hauv Teb Chaws Asmeskas Lub Tsev Haujlwm Saib Xyuas Kev Ua Haujlwm xav kom cov khoom siv hauv chaw ua haujlwm kom raug kuaj thiab lees paub los ntawm lub chaw kuaj xyuas hauv tebchaws ua ntej lawv tuaj yeem muag hauv khw. Cov qauv xeem siv suav nrog American National Standards Institute (ANSI); American Society for Testing and Materials (ASTM); Underwriters Laboratory (UL); thiab tshawb fawb lub koom haum tus qauv rau kev sib nrig sib paub ntawm factories. ▍ Txheej txheem cej luam o...