Opening, closing the laptop cover:
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Closing the laptop cover, Opening
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Old computer keyboard
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Office work, general noise
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Bios, Sound signal of a bios computer
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Turn on, turn off the old monitor
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Insert the disk into the drive, read the
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Repeatedly pressing a computer mouse
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Floppy disk reading
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Computer keyboard
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Photocopy (photocopy)
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Signal read information, Computer interface
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Computer interface, signals
★★★★★