CMA is the abbreviation for China Metrology Accreditation, a certification and evaluation system for the testing and inspection capabilities and reliability of testing and inspection institutions. Referring to the "Evaluation Criteria for Qualification of Testing and Inspection Institutions (RB/T 214-2017)" established by market supervision administrative departments at or above the provincial level. For testing and inspection institutions, obtaining the CMA qualification is a mandatory certification system required to enter the testing service market, and it is legally binding.

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