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Wind power generation at high-rise passageway
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Wind power generation at high-rise wind passage
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Water tank of water-saving water closet
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Pen container
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Solar energy electric torch
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Solar energy heating cup
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Solar energy heating bag
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Traffic signal lamp switching system and method
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Multifunctional demonstration stand
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Pickle preserving method
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Timing automatically watering device
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Solar energy electric warming clothes
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Mosquito driving clothing
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Saucer
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Oil smoke machine convenient for cleaning
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