CD / DVD drive, disc read:
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Closes the CD / DVD tray, disc read, Opens
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Interference, Modem connection, signal
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The USB flash drive is inserted, removed
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Floppy disk reading
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Disc read, CD / DVD drive
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Signal read information, Computer interface
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Input error sound, Pressing a keypad
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Matrix printer
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Insert the disk into the drive, read the
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Fan noise, Turning on the computer, shutting
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Computer noise, Communication room
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Manual copy machine
★★★★★