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DEX+? ???
?? 14??? X+? ???? ??? ??? ??.
?? ???? X+? ???? ??? ??? ??? ????: ?? ? ?? ??, ?????, ?? ?? ???, ?? ??.
Professional Standard - Machinery, X+? ???
National Metrological Verification Regulations of the People's Republic of China, X+? ???
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, X+? ???
工業(yè)和信息化部, X+? ???
國家市場監(jiān)督管理總局、中國國家標準化管理委員會, X+? ???
Professional Standard - Ferrous Metallurgy, X+? ???
American National Standards Institute (ANSI), X+? ???