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According to the Metrology Law of the People's Republic of China, People's Republic of China compulsory certification of measuring instruments and testing management, which enforced compulsory inspection of measuring instruments regulations

According to the People's Republic of China metrology Act, the People's Republic of China compulsory measures for the verification of measuring instruments for the management of work, the Convention compulsory examination regulations on the management of measuring instruments

According to "People's Republic of China Method of variables", "People's Republic of China Compulsion Examination Work Measurement Appliance Examination Policing method", "Compulsion Examination Measurement Appliance Management Stipulation"

According to the measure of People's Republic, the People's Republic of mandatory inspection work measurement apparatus test management approach, the mandatory test measuring apparatus regulations on the management

According to the People's Republic of China metrology Act, the People's Republic of China compulsory measures for the verification of measuring instruments for the management of work, the Convention compulsory examination regulations on the management of measuring instruments