Computer simulated laser:
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Computer keyboard
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Computer interface, alarm
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Input error sound, Pressing a keypad
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Closes the CD / DVD tray, Opens
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CD / DVD drive, disc read
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Double click computer mouse
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Old computer keyboard
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Photocopy (photocopy)
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Read the, Insert the disk into the drive
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Hard disk, room noise, read, write
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Turn on, turn off the old computer
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Manual copy machine
★★★★★