Communication room, computer noise:
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Repeatedly pressing a computer mouse
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The USB flash drive is inserted, removed
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Turn off the hard drive, Turn on
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Franking machine
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Photocopy (photocopy)
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Signal read information, Computer interface
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Turn on, turn off the old monitor
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Office work, environmental sounds, typewriter
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Computer simulated laser
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Matrix printer
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Shutting, fan noise, Turning on the laptop
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Read the, Insert the disk into the drive
★★★★★