CD / DVD drive, disc read:
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Turn off the old computer, Turn on
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Disc read, CD / DVD drive
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The USB flash drive is inserted, removed
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Franking machine
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Laser printer
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Manual copy machine
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Double click computer mouse
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Signal read information, Computer interface
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Closes the CD / DVD tray, Opens
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Closing the laptop cover, Opening
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Read, room noise, write, Hard disk
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Matrix printer
★★★★★