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Laser printer
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Shutting, Turning on the computer, fan noise
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Closing the laptop cover, Opening
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Photocopy (photocopy)
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Computer interface, alarm
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Disc read, closes the CD / DVD tray, Opens
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Communication room, computer noise
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Turn off the old monitor, Turn on
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Signals, Computer interface
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Hard disk, read, room noise, write
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Matrix printer
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CD / DVD drive, disc read
★★★★★