Opens, closes the CD / DVD tray, disc read:
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Matrix printer
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Signals, Computer interface
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Laser printer
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Turn off the hard drive, Turn on
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Shutting, fan noise, Turning on the laptop
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Computer noise, Communication room
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Shutting, fan noise, Turning on the computer
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Modem connection, interference, signal
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Franking machine
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Insert the disk into the drive, read the
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Closes the CD / DVD tray, Opens
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General noise, Office work
★★★★★