Nowadays, there is a "high-speed rail fever" in the world. China's high-speed rail has already taken the lead in the world's high-speed rail from technology introduction to technology output and has successfully won global attention. With t

What is IP rating? IP is the abbreviation of Ingress Protection. The IP rating is the level of protection against the intrusion of foreign objects by electrical equipment enclosures. The source is the International Electrotechnical Commissi

ISO9001 certification is one of the core standards of a group of quality management systems included in the ISO9000 family of standards. The ISO9000 family of standards is a concept proposed by the International Organization for Standardiza

The CE mark is a safety qualification mark instead of a quality qualification mark. It is the "main requirement" that forms the core of the European Directive. The "CE" mark is a safety certification mark e5a48de588b662616964757a686964616f3