"Francis turbines" . . "Leffel turbines" . "Francis hydroturbine units" . . "Francis-" . "Francis turbine" . . . "francis turbine" . "Reversible Reverse turbine" . "Francis vertical axis turbines" . "Vertical Francis Turbines" . "Francis turbine" . . "Francis water turbine" . . "Francis reaction turbine" . "Francis units" . "Francis pump-turbines" . . "vertical Francis turbines" . "Francis-type turbines" . "reversible turbine" . . . "Leffel water wheel" . "Francis-type" . . . . . . "Francis shaft turbines" . "Francis" . . . . "Francis reversible pump-turbines" . "Francis Turbines" . . . "Francis type" . . . . . "FRANCIS type turbine" . "Francis pump-turbine" . "Vertical Francis Turbine Units" . "Francis Turbine" . "Francis turbine-generator" . "turbine" . .