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JPH03219813A
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Underground irrigation system in cultivated field and apparatus therefor
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JPH04106209A
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Wire-type falling dam and its construction
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US4877537A
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Pumping system for gates
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JPH0258617A
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Temporary coffering method for river
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JPH0227931A
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Washing feeder of fishing net
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JPH01223210A
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Gate open/close device
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JPH01192907A
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Portable type input device for gate-opening and closing machine
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JPS63148000A
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Pump installing method
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JPH0195712A
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Underground irrigation system in cultivated land
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JPS6342634A
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Plowland water level controller by pressure reducing valve
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JPS62291311A
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Operating device for parent and child gate
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JPS62289124A
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Plowland water level control apparatus by pressure reducing valve
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JPS62126925A
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Method for washing fishing net
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JPS6290421A
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Tide embankment
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JPS6259713A
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Automatic rising and falling dam
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JPS6244128A
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Fishing net washing and manual dragging machine
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JPS626618A
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Underground irrigation drain pipeline in plow land to which underground plowing and combination culvert was applied
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JPS61253518A
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Water pressure controller
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JPS61250215A
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Underground irrigating drain pipe line in farming land with tilled ground and combined culvert
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JPS61242276A
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Swimming pool utilizing river
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