Putting on the ballpoint pen:
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Seal, closes, pad opens
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Pen writing
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Removing the ballpoint pen cap
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Remove eraser by hand
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Take out a pencil from the pile.
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Pressing a button on a ballpoint pen
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Ballpoint pen
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Pressing a button on a ballpoint pen (on a
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Chalk writing on the blackboard
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Eraser
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Putting on the ballpoint pen
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Throw a ballpoint pen on the table
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