Office work, typewriter, environmental sounds:
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Fan noise, shutting, Turning on the laptop
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Communication room, computer noise
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Insert the disk into the drive, read the
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The USB flash drive is inserted, removed
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Double click computer mouse
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Floppy disk reading
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Laser printer
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Computer mouse movement
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Closing the laptop cover, Opening
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Computer interface, signals
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Computer interface, signal read information
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Turn on, turn off the hard drive
★★★★★