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#weir overflow #water flow #river dam #spillway #water structure #cascade

댐🌊💧

#hydraulics #water flow #dam #weir #spillway #water sheet

🌊⏬🧱

#weir #spillway #water falling #dam #river control

🧱🌊⬇️

#spillway #water release #dam outlet #floodgate #water flow control