Opens, closes the CD / DVD tray, disc read:
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Computer keyboard
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Turn on, turn off the hard drive
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Photocopy (photocopy)
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Fan noise, Turning on the computer, shutting
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Floppy disk reading
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Laser printer
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Disc read, Opens, closes the CD / DVD tray
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Computer simulated laser
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Computer interface, signal read information
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Turn on, turn off the old monitor
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Turn on, turn off the old computer
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General noise, Office work
★★★★★