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DE??? ??? ?? ? ???
?? 8??? ??? ??? ?? ? ???? ??? ??? ??.
?? ???? ??? ??? ?? ? ???? ??? ??? ??? ????: ??? ? ?? ??, ?? ??.
Professional Standard - Machinery, ??? ??? ?? ? ???
工業(yè)和信息化部/國家能源局, ??? ??? ?? ? ???
National Metrological Verification Regulations of the People's Republic of China, ??? ??? ?? ? ???
American Society for Testing and Materials (ASTM), ??? ??? ?? ? ???
Professional Standard - Military and Civilian Products, ??? ??? ?? ? ???