Matrix printer:
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Manual copy machine
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Opens, disc read, closes the CD / DVD tray
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Computer interface, signal read information
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The USB flash drive is inserted, removed
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Jet printer
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Computer mouse click
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Computer mouse movement
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Turn off the hard drive, Turn on
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Closes the CD / DVD tray, Opens
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Repeatedly pressing a computer mouse
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Shutting, Turning on the computer, fan noise
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Bios, Sound signal of a bios computer
★★★★★