According to the controlling requirement of megawatt wind driven generator with variable propeller pitch of horizon axis, the hydraulic control system of a variable propeller pitch is designed.
针对兆瓦级水平轴变桨距风力发电机的控制要求，设计了变桨距液压控制系统。
2
As an advanced nc machining technology, five-axis machining for propeller is widely used abroad but limited in domestic.
螺旋桨五轴数控加工技术作为一种先进的加工方法，在国外已经广泛应用而在国内的应用水平较低。
3
Modern horizontal axis wind turbines of the "high-speed" type, as used in large scale power generation, typically include two or three propeller-style blades with a diameter of 100 meters or more.