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DE????? ??
?? 7??? ????? ??? ??? ??? ??.
?? ???? ????? ??? ??? ??? ??? ????: ?? ??, ?? ??, ???, ???, ???, ??.
Professional Standard - Electron, ????? ??
Professional Standard - Surveying and Mapping, ????? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ????? ??
國家市場監(jiān)督管理總局、中國國家標(biāo)準(zhǔn)化管理委員會, ????? ??