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DE?? ?? ???
?? 4??? ?? ?? ???? ??? ??? ??.
?? ???? ?? ?? ???? ??? ??? ??? ????: ??? ??.
National Metrological Verification Regulations of the People's Republic of China, ?? ?? ???
Korean Agency for Technology and Standards (KATS), ?? ?? ???
National Metrological Technical Specifications of the People's Republic of China, ?? ?? ???