Early telegraph, one can only pass a message, and can not be exchanged signals, because Edison itself telegraph technician, proceeded to improvement of traditional transmitters, create two heavy transmitters, in 1874 and developed a four retransmitted machine, which is synchronized transmitter. In the radio has not yet developed at that time, synchronous transmitter is a major breakthrough. ghd hair All know, the modern telephone invented by Bell, in fact, be able to clear telephone reception and speaker, thanks to Edison test again and again, breaking the traditional stereotype, to create a toner transmitter, in one fell swoop improve phone sensitivity, volume, receiving distance, otherwise cheap ghd Now when you call or will often : Hey !
Hear ah, can not hear it. December 1877 a night, dream Luo Park Laboratory staff trembling slightly, not because of the cold, but because ghd straightener heard, first leaving a voice gramophone, this great invention, not little introduction, we can understand how wide cheap ghd the application surface. French government, therefore also granted the title of Sir Thomas Edison do ! Later, Edison phonograph repeatedly modified until the drum into bakelite turntable -style until the middle is not one or two years only, but after decades of continuous improved Oh !
Early 19th century, people began to use gas lamps ( gas lights ), but gas is supplied by pipeline, a leak or blockage but it is very easy to crash, people lighting reforms, very strong. In fact, Edison set for themselves an impossible task : In addition to improved lighting, coach outlet online we should also create a set of powered systems. Then cheap ghd and dream Luo park partners, and nights of 1600 made several resistant material and more than 600 kinds of plant fiber experiments was to create the first carbon filament light bulb, can be a burning 45 hours.
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