-America, Canada- cTUVus&ETL
isevisi
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I-North America- cTUVus&ETL
▍Isingeniso I-Occupational Safety and Health Administration (OSHA) ngaphansi koMnyango Wezabasebenzi wase-US idinga ukuthi imikhiqizo esetshenziswa endaweni yokusebenza ihlolwe futhi iqinisekiswe ilabhorethri eyaziwa kuzwelonke ngaphambi kokuthi ithengiswe emakethe. Amazinga okuhlola asetshenziswayo ahlanganisa i-American National Standards Institute (ANSI); I-American Society for Testing and Materials (ASTM); I-Underwriters Laboratory (UL); kanye nezinga lenhlangano yocwaningo lokuqashelwa okufanayo kwamafekthri. ▍ Uhlolojikelele o...