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martes, 27 de mayo de 2014

INVENTIONS

TELEVISION
It's a mechanical system ultimately. It can transmit moving pictures. It's made from plastic and glass. It can be of different colours but normaly it's black or gray. It was inventes by John Logie in 1925.


TELEPHONE
It's an electric objet. It can produce an electrical waveform that corresponds to the vibration. It's made from metal. It can be of different colours. It was invented by Alexander Graham in 1876.

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