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DE?? ??
?? 21??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ??? ???, ?? ?? ???, ?? ? ?? ??, ?, ??, ?? ??, ?? ??.
National Metrological Verification Regulations of the People's Republic of China, ?? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??
Professional Standard - Machinery, ?? ??
Instrument Society of America (ISA), ?? ??
American Society of Mechanical Engineers (ASME), ?? ??
National Metrological Technical Specifications of the People's Republic of China, ?? ??
British Standards Institution (BSI), ?? ??
GCC Standardization Organization, ?? ??
Kingdom of Bahrain Testing and Metrology Directorate, ?? ??
Bureau of Indian Standards, ?? ??
Danish Standards Foundation, ?? ??
International Organization for Standardization (ISO), ?? ??
Association Francaise de Normalisation, ?? ??