Computer mouse click:
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Closes the CD / DVD tray, Opens
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Turning on the computer, fan noise, shutting
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Repeatedly pressing a computer mouse
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Computer interface, signal read information
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The USB flash drive is inserted, removed
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Laser printer
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Matrix printer
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Floppy disk reading
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Jet printer
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Turn off the old computer, Turn on
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Photocopy (photocopy)
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Input error sound, Pressing a keypad
★★★★★