Computer simulated laser:
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Repeatedly pressing a computer mouse
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Turn off the hard drive, Turn on
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Turn on, turn off the old computer
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Disc read, CD / DVD drive
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Photocopy (photocopy)
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Opens, closes the CD / DVD tray
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Jet printer
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Matrix printer
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Opens, disc read, closes the CD / DVD tray
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Computer keyboard
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Environmental sounds, typewriter, Office work
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Shutting, fan noise, Turning on the laptop
★★★★★