fine-pitch device 诸如薄的密间距元件 ; 微细间距器件

fine pitch device 窄节距器件

pitch damping device 纵摇阻尼装置 ; 减纵摇装置

pitch follow-up device 螺距随动装置

pitch revising device 螺距校正装置

pitch-regulated device 变桨距机构

screw-pitch revising device 螺距校正装置

Blade Pitch Adjustment Device 叶片节距调节装置

pitch-up warning device 自动上仰警告器