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  5. Fluid control, treatment, or containment
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Natural bottom culvert and method for installation

Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent

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Natural cue surface bypass collector

Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Reexamination Certificate

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Navigational bypass, gate and pump device for use in water

Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent

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Non-clogging debris and sediment removal facility

Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Reexamination Certificate

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Non-clogging eaves trough

Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent

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Non-vibrating collapsible dam

Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent

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