Increasingly frequent use of the product in connection with the terminal areas, More and more people put 
more demands on the IT, New production technology and equipment in use, scientific production process 
and quality control method greatly improves the quality of the terminal and life. Meanwhile, with the rising 
calls for environmental protection, WHO clearly recognized in the country, terminal requirements of 
environ-mental protection is essential. Halogen - free flame retardant substance added, conductor and 
insulator of drug - free, lead - free plating are a positive response is a response to that request.