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Composition of yellow soil and pavement method using the same
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Tunnel water spray
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Possible median strip for u-turn
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Snow protection fence
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Road median strip having an ability for controlling vehicles
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A safe checking apparatus using bridge
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Structure of the rivers bottom block the agriculture irrigation channel it will be able to use a rivers possibility
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Purification apparatus using river
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Movable step for the water level regulation of the rivers
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Sluice gates under a bridge of clean water
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