弹簧罩迫紧螺帽 retaining nut: 扣紧螺帽; 扣紧螺母; 锁紧螺母; 止动螺母retaining spring: 止动弹簧cone seat (for retaining nut): 锥型座(螺帽定位用)wheel retaining nut: 轮体扣紧螺母spring nut: 弹簧螺帽; 点火正时记号下载手机词典可随时随地查词查翻译