Opening, closing the laptop cover:
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Manual copy machine
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Turn off the hard drive, Turn on
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Interference, signal, Modem connection
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Opening, closing the laptop cover
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Opens, closes the CD / DVD tray, disc read
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Computer mouse click
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Photocopy (photocopy)
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Old computer keyboard
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Turn off the old monitor, Turn on
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Laser printer
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Alarm, Computer interface
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Computer noise, Communication room
★★★★★