CD / DVD drive, disc read:
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CD / DVD drive, disc read
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Opens, disc read, closes the CD / DVD tray
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Jet printer
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Closing the laptop cover, Opening
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Communication room, computer noise
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Repeatedly pressing a computer mouse
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The USB flash drive is inserted, removed
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Computer interface, signals
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Laser printer
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Turn on, turn off the hard drive
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Hard disk, room noise, write, read
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Double click computer mouse
★★★★★