Laser printer:
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Removed, The USB flash drive is inserted
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Manual copy machine
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Shutting, Turning on the laptop, fan noise
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Computer mouse click
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Typewriter, Office work, environmental sounds
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Computer simulated laser
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Turning on the computer, fan noise, shutting
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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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Turn on, turn off the old monitor
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Old computer keyboard
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Signal read information, Computer interface
★★★★★