The registration agency is the shenzhen market supervisory authority, represented by a legal person, and includes the sale of labour protection items, hardware, office supplies, industrial aids, security equipment, craft gifts, clothing and related technical advice; the sale of fire protection equipment; maintenance of the roofs of security equipment and electrical tools; domestic trade; import and export operations; sale of electronic products; radiation protection products, radio-screened products, cleaning materials, hardware construction materials, plastics, plastic packaging materials; and training of products. The first category of medical equipment is sold; the second category of medical equipment is retailed; the second category of medical equipment is retailed. The sale of smart instrument instruments; the sale of instrument instruments; the sale of laboratory analytical instruments; the sale of technical services, technology development, technical advice, technology exchan...