Hard disk, read, write, room noise:
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Jet printer
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Repeatedly pressing a computer mouse
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Laser printer
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Turn on, turn off the old computer
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Turn off the hard drive, Turn on
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Turning on the laptop, shutting, fan noise
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Old computer keyboard
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Computer interface, signal read information
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Room noise, read, write, Hard disk
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General noise, Office work
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Turn on, turn off the old monitor
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Opening, closing the laptop cover
★★★★★