Задача id10761

Determine the pressure gauge reading Pm.atm if the flow rate of water passing through the pipeline (Fig. ) is Q = 30 m3/h. Pipeline length l = 120 m, height h = 710 mm, pipe diameter d = 100 mm, roughness d = 0.5 mm, Ludlo valve opening degree h/d = 0.7, bend radius R = 200 mm.

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