128243 ⎘
Barrages or weirs; Layout, construction, methods of, or devices for, making same; Movable barrages; Lock or dry-dock gates; Swinging or turning gates Gates turning round a horizontal axis arranged midway of the flap
A WATER-LEVEL CONTROL UNIT WITH A DOWNWARDLY HANGING HINGED LOWER FLAP PORTION OF A VALVE ELEMENT AND A FLOATING BODY CONNECTED THERETO
Automatic adjustable valve
Shaft power plant