Removing the ballpoint pen cap:
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Stapler
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Crunching paper rustling
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Throw a pencil
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Electric pencil sharpener
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Putting on the ballpoint pen
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Pressing a button on a ballpoint pen
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Stamp, Plastic seal
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Eraser
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Ballpoint pen machine, press a button, write
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Click on the calculator buttons
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Removing the ballpoint pen cap
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Chalk writing on the blackboard
★★★★★