Source google image: https://img.yumpu.com/16507930/1/358×507/gruppi-idraulici-turbine-con-elica-a-pale-fisse.jpg?quality=85
Hotte elica ciak gr/a/86
Source google image: https://img.yumpu.com/16507930/1/358×507/gruppi-idraulici-turbine-con-elica-a-pale-fisse.jpg?quality=85