[机] 变距风扇 variable pitch fan: 变距风扇variable pitch fan engine: 变距风扇发动机pitch fan: 俯仰操纵风扇variable pitch: 变斜度; 可变程度; 可变节距,可变螺距; 可调节距variable-pitch: 变节距下载手机词典可随时随地查词查翻译