变速变桨
variable speed variable pitch
variable speed pitch regulated
变速变桨距
Variable-speed Variable-pitch
variable-speed pitch controlled
变速-变桨距
variable speed-variable pitch
变速变桨距风电机组
variable-speed variable-pitch wind turbine
变速变桨距风力机
variable speed pitch regulated wind turbine
螺旋桨变距机构
Propeller pitch control mechanism
螺旋桨桨叶安装角
angle of propeller blade setting