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DE??? ??? ??
?? 5??? ??? ??? ??? ??? ??? ??.
?? ???? ??? ??? ??? ??? ??? ??? ????: ?? ? ??.
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ??? ??? ??
Professional Standard - Commodity Inspection, ??? ??? ??
Tianjin Provincial Standard of the People's Republic of China, ??? ??? ??