Computer keyboard:
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Repeatedly pressing a computer mouse
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Turn off the old computer, Turn on
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Room noise, write, read, Hard disk
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Closes the CD / DVD tray, Opens
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Jet printer
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Double click computer mouse
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Photocopy (photocopy)
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Laser printer
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Fan noise, shutting, Turning on the computer
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Computer interface, signal read information
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Office work, general noise
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Computer noise, Communication room
★★★★★