Opens, closes the CD / DVD tray, disc read:
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Fan noise, shutting, Turning on the computer
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Removed, The USB flash drive is inserted
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Disc read, CD / DVD drive
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Franking machine
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Jet printer
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Bios, Sound signal of a bios computer
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Computer simulated laser
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Turn on, turn off the old computer
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Read the, Insert the disk into the drive
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Turn on, turn off the old monitor
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Opening, closing the laptop cover
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Signals, Computer interface
★★★★★