Pressing a keypad, input error sound:
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Alarm, Computer interface
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Closes the CD / DVD tray, Opens
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General noise, Office work
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Insert the disk into the drive, read the
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Removed, The USB flash drive is inserted
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Shutting, fan noise, Turning on the laptop
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Interference, signal, Modem connection
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Computer interface, signal read information
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Turn off the old computer, Turn on
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Computer mouse click
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Manual copy machine
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Opening, closing the laptop cover
★★★★★