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Group Standards of the People's Republic of China, ?? ? ??

German Institute for Standardization, ?? ? ??

Korean Agency for Technology and Standards (KATS), ?? ? ??

The Directorate General of Specifications and Metrology (DGSM) , ?? ? ??

British Standards Institution (BSI), ?? ? ??

Professional Standard - Hygiene , ?? ? ??

國家市場監督管理總局、中國國家標準化管理委員會, ?? ? ??





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