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Certification is a form of credit guarantee. According to the definitions of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC), it refers to the certification by a nationally recognized certification body that an organization’s products, services, and management systems comply with relevant standards, technical specifications (TS) or its mandatory requirements Conformity assessment activities.
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China's RoHS will be upgraded in an all-round way, and it is proposed to increase the requirements f
GB 40070-2021 hygienic requirements for myopia prevention and control of school supplies for childre








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