linear icon, fan propeller blades. rotation of three and four bladed turbines. simple black and white on white

propeller blade wind fan air rotation equipment turbine cooler rotor ventilator engine blower circle electric technology power turning airflow flow plane simplicity spin aeroplane aircraft aviation climate marine energy computer car ship industry water vector icon sign symbol isolated silhouette black outline shape simple pictogram thin line contour linear blades three four bladed turbines white background