Insert the disk into the drive, read the disk, take it out:
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Office work, typewriter, environmental sounds
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Turn off the old monitor, Turn on
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Repeatedly pressing a computer mouse
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Jet printer
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Closes the CD / DVD tray, Opens, disc read
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Signals, Computer interface
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Manual copy machine
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Opening, closing the laptop cover
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Photocopy (photocopy)
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Turn on, turn off the hard drive
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Computer keyboard
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Computer interface, alarm
★★★★★