不等螺距弹簧 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pitch (spring): 节距(弹簧)pitch of spring: 弹程variable spring: 变量泉; 变流量泉下载手机词典可随时随地查词查翻译