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

國家能源局, ?? ??????? ??

Professional Standard - Petroleum, ?? ??????? ??

機械電子工業部, ?? ??????? ??

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

Professional Standard - Machinery, ?? ??????? ??

國家市場監督管理總局、中國國家標準化管理委員會, ?? ??????? ??

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

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

機械工業部, ?? ??????? ??

Professional Standard - Agriculture, ?? ??????? ??

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





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