Turn on, turn off the old monitor:
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Computer keyboard
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Room noise, Hard disk, write, read
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Sound signal of a bios computer, bios
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Computer interface, signals
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Turn off the old monitor, Turn on
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Old computer keyboard
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Photocopy (photocopy)
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Closes the CD / DVD tray, Opens, disc read
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Closes the CD / DVD tray, Opens
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Opening, closing the laptop cover
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Manual copy machine
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Office work, general noise
★★★★★