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General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ????

National Metrological Verification Regulations of the People's Republic of China, ????

Professional Standard - Machinery, ????

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

American National Standards Institute (ANSI), ????

National Metrological Technical Specifications of the People's Republic of China, ????

國家質量監督檢驗檢疫總局, ????

CN-STDBOOK, ????





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