Expensive original charger recovery, Chengdu charger recycling, electronic Obo

How to contact current and Sonic together to achieve remote call has plagued people. ^ American Alexander Bell is destined to accomplish this historic task, he systematically studied the human voice, vocal and acoustic vibration mechanism principle in the design of hearing aids for the deaf in the process, he discovered that current conduction and stop moment, the spiral coil issued a noise, this finding makes Bell whim, with a current strength of the sound to simulate changes in the size of the charger recycling companies, which use the current transfer sound. From this point onwards, Bell and his assistant Wo Sente began the difficult process of designing phones. June 2, 1875, the final design and 沃森特 Bell model and ongoing improvements to the moment of final testing, 沃森特 put his ear to the closed door of another room ready to answer on the speakers, Bell When the final operation accidentally spilled sulfuric acid in her lap, and he cried in pain, Mr. Wo Sente, come help me ah! 'Did not think that these words through his experiments telephone spread work in another room, Mr. 沃森特 ears. Very common phrase, then, became the first human to a speech delivered by telephone and remember people in history. June 2, 1875, it also invented the telephone as a great day to be remembered and where there is a charger recycling, but this place ^ Boston Court Road No. 109 US manned annals therefore, has its entrance still pinned bronze medals above Juan: 'June 2, 1875 telephone born here. 'March 7, 1876, Bell invented the telephone to obtain patents, patent certificate number is 174655.1877 year, the second year after Bell invented the telephone, in Boston and New York to set up the first telephone line opened, the two apart 300 km. Also in that year, it was the first phone to "Boston Globe" Send the news, from the beginning of the era of the public to use the phone. Within a year, Bell installed a total of 230 calls, the establishment of the Bell Telephone Company, which is the predecessor of American Telephone and Telegraph Company. 1949, China Telecom system develops slowly, as of 1949, China telephone penetration rate of only 0.05 , only 260,000 telephone subscribers. After 1949, the Central People's Government of the rapid recovery and development of mobile phones. 1958 Beijing telegraph building built up to become an important milestone in the history of new China phone. Decades 'Cultural Revolution', post again hit, has been a loss, business stagnation. 1978 years ago, Sony mobile phone charger recycling, the national telephone penetration rate of only 0.38, less than one tenth of the world level, the total number of telephones China the world's population has less than 1/5 of the world's total phone 1 ^ telephones for every 200 people have a less than 75 years behind the United States. Switch automation gravity low, most of the county, is still in use in rural areas 'crank', long-distance transmission mainly by open-wire, and analog microwave. 1978 years ago, the national telephone capacity 3.59 million, 2.14 million users, penetration 0.43 ^. After the reforms, backwardness phone network has become the bottleneck of economic development, since the 20th century, the mid-1980s, the Chinese government to speed up the construction of basic telecommunication facilities, as of February 2010 Chargers recovered, a net increase of 7.87 million telephone subscribers nationwide. Among them, 1.497 million fixed telephone users reduce, a net increase of 9.367 million mobile phone users.