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Environmental sounds, Office work, typewriter
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Turn off the hard drive, Turn on
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Pressing a keypad, input error sound
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Disc read, Opens, closes the CD / DVD tray
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Opening, closing the laptop cover
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Turn off the old computer, Turn on
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Old computer keyboard
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The USB flash drive is inserted, removed
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Computer noise, Communication room
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Photocopy (photocopy)
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Computer mouse movement
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Computer keyboard
★★★★★