Laser printer:
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Photocopy (photocopy)
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Removed, The USB flash drive is inserted
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Manual copy machine
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Double click computer mouse
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Computer interface, alarm
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Closes the CD / DVD tray, Opens, disc read
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Turn off the hard drive, Turn on
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Signal read information, Computer interface
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Repeatedly pressing a computer mouse
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Jet printer
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Computer interface, signals
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Shutting, Turning on the computer, fan noise
★★★★★