Laser printer:
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Signal, interference, Modem connection
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Environmental sounds, Office work, typewriter
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Opens, closes the CD / DVD tray, disc read
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Opens, closes the CD / DVD tray
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Manual copy machine
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Computer simulated laser
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Photocopy (photocopy)
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Signal read information, Computer interface
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Turn off the hard drive, Turn on
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Computer keyboard
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Office work, general noise
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Turn off the old monitor, Turn on
★★★★★