WOLFRAM SYSTEM MODELER
    TwoPortModel with two connectors (dynamic components)  | 
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SystemModel["Hydraulic.Interfaces.TwoPort"]

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         Hydraulic.LiquidContainers Model of a tank with environment pressure at inlet, hydrostatic pressure at the bottom, and an outlet orifice  | 
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         Hydraulic.LiquidContainers.Internal Model of a tank with fluid height as output  | 
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         Hydraulic.Valves.DirectionalControl.Internal Partial valve with two ports and two states  |