Chalk writing on the blackboard:
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Ballpoint pen
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Tape holder, tape over carton
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Apply tape to tape
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Removing the ballpoint pen cap
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Stamp, Plastic seal
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Scissors cutting paper
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Throw a pencil
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Throw a ballpoint pen on the table
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Pressing a button on a ballpoint pen
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Remove eraser by hand
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Chalk writing on the blackboard
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Manual pencil sharpener
★★★★★