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JPS62214273A
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Method of generating power by river bed parallel digging dam
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JPS60160828A
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Fishing method by underwater sound wave line transfer
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JPS6095013A
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Power generating method by means of dug-down river-bed dam
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JPS59150814A
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Power generation by combined use of estuary dam and high-tide water pumping type power plant
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JPS59134216A
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Power generation by combined use of river mouth dam and water pumped storage system at high tide
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JPS59132833A
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Acoustic fence for fishing
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JPS59126081A
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Electric power generation utilizing estuarine dam and system of lifting water upon high tide in combination
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JPS59126814A
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Power generation by dam formed by excavating river bed in parallel
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JPS5915113A
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Power generation by using excavated dam
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JPS5877172A
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Effective utilizing method of overflow energy
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JPS5896177A
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Power generating method by dug-down dam
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JPS54118897A
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Method of measuring area of seawater flowing back into river
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JPS52150289A
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Fishing method using automatic net development
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JPS52132530A
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Method of disposing of deposit sand in dam
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JPS51145786A
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Acoustic fence for fishes
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JPS51118696A
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Acoustic fence for fishes
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JPS51114285A
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Acoustic fence for fishes
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JPS5151485A
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Gyozokuyo onkyosaku
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JPS5145091A
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Gyozokuyo onkyosaku
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