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Electric safety pencil sharpener
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A kind of automatic entrance-exit mechanism of pencil sharpening device
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A kind of automatic paper crusher
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The machine core of electric pencil-sharpening unit
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The swing lifting mechanism of lower riveter in a kind of self-binder
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A kind of pencil sharpener frame
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A kind of binder
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A kind of electric pencil-sharpening unit
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A kind of pencil holding mechanism of penknife
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Labor-saved stapler
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A kind of movement of electric pencil sharpener
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Core of electric pencil sharpening machine
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Flat nailing stapler
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Automatic paper shredder
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Method for completely deleting data in storage device
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Data cleaning control method and equipment
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Pencil retreating trigger mechanism of electric pencil sharpener
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Improved electric stapler
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Paper shredder with pencil sharpening function
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Labor-saving stapler
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