Opens, closes the CD / DVD tray:
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Computer noise, Communication room
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Computer mouse click
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Turn on, turn off the old computer
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Photocopy (photocopy)
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The USB flash drive is inserted, removed
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Franking machine
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Computer interface, signals
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Turning on the laptop, fan noise, shutting
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CD / DVD drive, disc read
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Computer interface, alarm
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Manual copy machine
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Turn on, turn off the old monitor
★★★★★