Jet printer:
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Removed, The USB flash drive is inserted
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Opens, closes the CD / DVD tray
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Opening, closing the laptop cover
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Fan noise, Turning on the computer, shutting
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Interference, signal, Modem connection
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Laser printer
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Old computer keyboard
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Computer interface, signal read information
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Turning on the laptop, shutting, fan noise
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Computer keyboard
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Closes the CD / DVD tray, Opens, disc read
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Matrix printer
★★★★★