Office work, typewriter, environmental sounds:
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Turn off the old monitor, Turn on
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Computer interface, alarm
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Old computer keyboard
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Room noise, read, write, Hard disk
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Computer mouse click
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Matrix printer
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The USB flash drive is inserted, removed
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Read the, Insert the disk into the drive
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Laser printer
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General noise, Office work
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Manual copy machine
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Office work, typewriter, environmental sounds
★★★★★