亚洲国产剧情在线_欧美一区二区三区日本_综合欧美乱伦免费_日韩免费av在线播放网_性动态图无遮挡试看30秒_亚洲日韩自偷自拍中文字幕_美女如厕露p精品高清系列_男女无遮挡羞羞视频_熟女偷拍中文字幕视频_怡红院免费的全部视频国产a

What are the basic materials for mobile phone manufacturing?
From the mobile phone from the inside to the outside of mobile phone, divided into pieces of metal and plastic parts, and then the second board, as well as with the camera and other electronic components such as receiver!
From manufacturing, the external metal structure of mobile phone is mainly used SUS304, SUS303 stainless steel materials, but also includes the white copper, brass, aluminum alloy material, etc.! Material selection is mainly based on the mobile phone to achieve the desired function!
The strip continuous die stamping molding mainly through the metal, of course it is more complex, then through welding, riveting, hot melt, ultrasonic process will vary in size but belongs to the whole metal parts are assembled into a whole, need to have reached the manufacturers. The plastic parts are mainly through the way to complete the injection molding, the material is mainly PC, PC+PT and so on! Selection method is same as above!
Other parts are mainly purchased by the supplier, and then get the mobile phone motherboard manufacturers can be assembled into a complete mobile phone!