Insert the disk into the drive, read the disk, take it out:
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Shutting, Turning on the laptop, fan noise
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Opening, closing the laptop cover
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Office work, typewriter, environmental sounds
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Hard disk, read, write, room noise
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Old computer keyboard
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Turn on, turn off the old computer
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Manual copy machine
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Franking machine
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Jet printer
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The USB flash drive is inserted, removed
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Repeatedly pressing a computer mouse
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Turn off the hard drive, Turn on
★★★★★