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Blind crutch capable of realize real-time speech timing
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Solar mobile phone based on display screen
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Traffic ship using wind energy and solar energy as main power source
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Efficient earthquake forecasting method
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Track type overpass elevator
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Humpback-proof/ myopia-proof pen with rotary probe
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Clothes hanger
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A kind of display device/the platen bracket that to put of hanging
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Life saving glass impinger
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Swing bed for infant
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Double-layer waiting booth
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