Hard disk, read, write, room noise:
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The USB flash drive is inserted, removed
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Franking machine
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Turn off the old computer, Turn on
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Floppy disk reading
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Laser printer
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Opens, closes the CD / DVD tray
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Interference, signal, Modem connection
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Computer simulated laser
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Bios, Sound signal of a bios computer
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Manual copy machine
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Computer keyboard
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Insert the disk into the drive, read the
★★★★★