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A kind of detachable chemical centrifugal pump
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A kind of fountain brush pen
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A kind of binding device
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A kind of safe and reliable binding device and binding system device
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A kind of clip attaching device of Multi-function pen
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A kind of intelligentized device for pilling paper sheets
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A kind of stable device for pilling paper sheets
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A kind of cotton candy machine of automation
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A kind of suction straw
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A kind of device convenient for suction pipe on management automatic vending machine
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A kind of reliable billboard
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