The Gorlov HelicalTurbine, as it is known, allows you to use any stream, whatever the direction of its flow.
这个名为佐罗夫螺旋涡轮机的设备可以利用任何水流，不管流向如何。
2
The unsteady flow in a draft tube of Francis turbine under the off-design operation is produced by the dynamic behavior of a helical vortex rope with the dead core.