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Which mobile phone accessories _ Obo Electronics Recycling (certified) _ Fukunaga Recycling mobile phone accessories
Information Name: | Which mobile phone accessories _ Obo Electronics Recycling (certified) _ Fukunaga Recycling mobile phone accessories |
Published: | 2015-04-23 |
Validity: | 0 |
Specifications: | Limited |
Quantity: | |
Price Description: | |
Detailed Product Description: | This book has the following features: basic concepts and concise. On explain the basic concepts to be accurate and refined, making the non-mobile students can understand the meaning of related concepts. According to "transfer technology", "Switching", "access technology" has three major series with the overall structure of knowledge, theory and practice. For some practical, strong technology and products, this book gives the corresponding graphs, charts mobile phone accessories recycling business, to help readers in-depth and comprehensive understanding of the specific application methods related technology to improve the analysis and solving problems ability. Since the invention of the telephone, the mobile phone tools enable mankind to fully enjoy the convenience of a modern information society, but this is just a start, but it is not a wide range of popular, along with wireless telegraphy and radio broadcasts of the invention, it is more desirable to have a species can carry without phone line. Scientists hope the human shoulder, mobile phones have made unremitting efforts. Due to the need of the two world wars, the early prototype of mobile phones has been developed out of the recycling of mobile phone accessories, such as walkie-talkie, walkie-talkie. Among them, the walkie-talkie in 1941, the US Army began the equipment, then the use of the band is the band shortwave recovery Which mobile phone accessories, devices are tubes. From the beginning of the 1950s, and later developed for the use of 150 400 Yi 92, there followed the 1960s transistor, large numbers of private radio telephone system, used in police, fire, taxi and other industries. However, these can only be used in a small number of special populations and inconvenient to carry, so people look forward to a smaller, more convenient for the public use of personal mobile phones appear. With in-depth study of electromagnetic waves, the advent of LSI, before scientists hurdles have been cleared one by one, the mobile phone was first produced. It is mainly composed of the handset, the control means, the antenna and the power supply 4 parts. On the handset, in addition equipped with a microphone and headphones, as well as numbers, letters, display, control keys and dial keys and so on. The control assembly has a number of important functions modulation, demodulation and the like. Because handheld mobile phone is used in the flow, thanks to the power required to bring their own battery supply, then the use of nickel-cadmium batteries can be recharged. Mobile phone manufacturers out how to plan a network is a problem. Scientists first thought honeycomb structure, in architecture, on the honeycomb structure is a cost-effective manner, the mobile network can be taken in the same way, then use a different frequency adjacent cells recovered professional mobile phone accessories, cell in the distant on the use of the same frequency. In this way, effectively avoid frequency conflicts, but also allows the same frequency used multiple times, saving frequency resources. This theory neatly solves the limited number of high-density and high-frequency frequency conflicts and user demand service coverage area across the channel automatically converted problem of mobile phone accessories electronic recycling Which _ Obo (certified) _ Fukunaga phone accessories recovered from Shenzhen City Aobo Electronic Technology Limited. Shenzhen Electronic Technology Co., Obo (www.aobodz.com) is Shenzhen, the other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Obo electronic leadership with the staff warmly welcome all inquiries negotiations to create a better future for electronic Obo. |
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Copyright © GuangDong ICP No. 10089450, Shenzhen Electronic Technology Co., Obo All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
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You are the 12041 visitor
Copyright © GuangDong ICP No. 10089450, Shenzhen Electronic Technology Co., Obo All rights reserved.
Technical support: ShenZhen AllWays Technology Development Co., Ltd.
AllSources Network's Disclaimer: The legitimacy of the enterprise information does not undertake any guarantee responsibility