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Circular rotary motion method of lever
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Construction method for saving water release necessary for descending vessel in passing of vessel in ravine canal
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Separation method of muddy water containing earth, sand, gravel, and the like and device thereof
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Sediment and gravel contained slurry separating method and device
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Trawl fishery method and apparatus therefor
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Device for removing slime in pile hole bottom section
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Method and apparatus for casting piles in position
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Earth auger for cast-in-place pile and its auger head
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Earth auger for in-situ pile and auger head therefor
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Earth drill
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Antirolling ship
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Device for removing slime in bottom of pile hole
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Circulation of permanent motion
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Circular revolution device for lever
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Visual inspection in mud water
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Visual inspection in mud water
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Earthquake damping apparatus
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Remover for slime on bottom pile pit
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