Opening, closing the laptop cover:
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Read, write, room noise, Hard disk
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Read the, Insert the disk into the drive
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Old computer keyboard
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Photocopy (photocopy)
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Laser printer
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Signals, Computer interface
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Repeatedly pressing a computer mouse
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Computer interface, alarm
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Turn on, turn off the old monitor
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Modem connection, interference, signal
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Opening, closing the laptop cover
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Manual copy machine
★★★★★