弹簧开关下托脚 bottom bracket: 底托架; 五通; 下托架; 轴承架spring bracket: 弹簧架; 弹簧托架; 弹簧支架; 簧托handle spring: 手柄弹簧spring handle: 弹簧手柄starting handle bracket: 起动摇手柄支架下载手机词典可随时随地查词查翻译