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

國家能源局, ??? ????

International Telecommunication Union (ITU), ??? ????

CZ-CSN, ??? ????

工業(yè)和信息化部, ??? ????

American Society for Testing and Materials (ASTM), ??? ????

Japanese Industrial Standards Committee (JISC), ??? ????

Professional Standard - Commodity Inspection, ??? ????





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