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INTRODUCTION |
CAR MP3 PLAYER know
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The car MP3 player can
wirelessly transmit the music from audio sources such as
MP3,MD,DVD and so on, to the car radio. People can enjoy it
after set the radio frequency as the transmission frequency
or after the radio searched the signal.
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 MOBILE
GPS know
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When people talk about
"a GPS," they usually mean a GPS receiver.
The Global Positioning System (GPS) is actually a constellation
of 27 Earth-orbiting satellites (24 in operation and three
extras in case one fails). A GPS receiver's job is to locate
four or more of these satellites, figure out the distance to
each, and use this information to deduce its own location.
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