Opens, closes the CD / DVD tray, disc read:
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Photocopy (photocopy)
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Environmental sounds, Office work, typewriter
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Disc read, Opens, closes the CD / DVD tray
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Computer interface, signals
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Manual copy machine
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Matrix printer
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Removed, The USB flash drive is inserted
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Office work, general noise
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Computer keyboard
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Turn off the old monitor, Turn on
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Insert the disk into the drive, read the
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Jet printer
★★★★★