-America, Canada- cTUVus&ETL
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North America- cTUVus&ETL
▍ Okwu Mmalite Ọrụ Safety and Health Administration (OSHA) n'okpuru Ngalaba Na-ahụ Maka Ọrụ na United States chọrọ ka a nwalere ngwaahịa ndị a na-eji n'ebe ọrụ ka ụlọ nyocha nke obodo mara ọkwa tupu ere ha n'ahịa. Ụkpụrụ ule ejiri mee ihe gụnyere American National Standards Institute (ANSI); American Society for Testing and Materials (ASTM); Ụlọ nyocha ndị na-ede akwụkwọ (UL); na ụkpụrụ nhazi nyocha maka nnabata ọnụ ụlọ ọrụ. ▍ Nchịkọta o...