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Evacuation System for high-rise building using drone
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National flag learning tool set and Step-by-step national flag learning method by using them
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The low height of the golf ball tee device
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Using a monorail transportation system
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Rail bicycle
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The interior the driving range where draws horizontally
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The chair which has a machine function
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The electronic power plant which uses the buoyancy of the bubble
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Lifting device for sending vertically golf-ball
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The method of processing sluge accumulated on dam's bottom and it's apparatus
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Transfer device for golf ball
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Lifting device for sending vertically golf-ball
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Conveyer for sending golf-ball
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Pole of golf excercise site
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Pole of golf excercise site
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Pole of golf excercise site
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Apparatus for laterally transporting golf ball in golf practice place
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Ball collection tank for golf training place
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Automatical golf training machine
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Golf ball auto supply device
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