42 Technical consulting and research for third parties in the fields of materials technology, electrical engineering, electronics, computer science, precision mechanics, medical engineering, mechanical engineering and process engineering, namely, conversion technology; Engineering services; Development and design of new technology for others in the field of materials technology, electrical engineering, electronics, computer science, precision mechanics, medical engineering, mechanical engineering, and process engineering, namely, conversion technology; design planning of technological improvements in the assembly process of third parties in the field of materials technology, electrical engineering, electronics, computer science, precision mechanics, medical engineering, and process engineering, namely, conversion technology; Design and development for others of computer data processing software in the fields of materials technology, electrical engineering, electronics, computer science, precision mechanics, medical engineering, mechanical engineering and process engineering, namely, conversion technology; Rental of electronic and electrical engineering equipment and rental of computer equipment