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JPH08155415A
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Method for bottom sludge deep bed replacing treatment of waste
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JPS63308106A
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Ascending waterway utilizing cavity of ocean
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JPS63200892A
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Continuous cleaning system of flowing water utilizing water level varying device of catalytic oxidation bank
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JPS63518A
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Floating structure utilizing space of water area
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JPS6178495A
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Preparation of active block
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JPS6080611A
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Tidal wave control system
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WO8401177A1
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Reflecting breakwater
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WO8401591A1
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System for purifying water area
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JPS58173208A
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Breakwater for clarifying water
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JPS58150608A
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Antipollution system for water region
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JPS5850212A
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Cleaning system for water region
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