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DE???? ???
?? 4??? ???? ???? ??? ??? ??.
?? ???? ???? ???? ??? ??? ??? ????: ??, ?? ?? ??.
Beijing Provincial Standard of the People's Republic of China, ???? ???
Hunan Provincial Standard of the People's Republic of China, ???? ???
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ???? ???