Matrix printer:
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Opens, closes the CD / DVD tray
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Computer mouse movement
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Computer keyboard
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Signals, Computer interface
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Turn on, turn off the old computer
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Shutting, fan noise, Turning on the laptop
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Removed, The USB flash drive is inserted
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Signal read information, Computer interface
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Photocopy (photocopy)
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Floppy disk reading
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Computer mouse click
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Turn on, turn off the hard drive
★★★★★