Opening, closing the laptop cover:
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Computer interface, alarm
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Office work, general noise
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Read the, Insert the disk into the drive
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Turn off the hard drive, Turn on
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Computer keyboard
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Photocopy (photocopy)
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Closing the laptop cover, Opening
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Computer noise, Communication room
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Old computer keyboard
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The USB flash drive is inserted, removed
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Laser printer
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Signals, Computer interface
★★★★★