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Automatic bill-board of packing up during strong wind
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Self-cleaning windproof self-descending LED (light emitting diode) billboard device
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Device for cleaning waste in glass billboard
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Wind power generation equipment capable of automatically replacing advertisements and freely lifting
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Billboard device capable of generating power by wind energy beside high-speed rail
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Unmanned aerial vehicle for removing telegraph pole small advertisements
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Cleaning and protecting device for street advertisement display screen
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a sealing paper preservation protection equipment
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Large capacity paper notice circulation display device convenient to add
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Automatic device of puting up of strip of paper used for sealing
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Liftable and outdoor bill-board of subsidiary function of keeping off rain
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