第三档电磁阀
third speed solenoid valve
变速箱倒档电磁阀
transmission reverse solenoid valve
电磁阀电气试验
solenoid valve electrical test
三滑阀电磁阀
three-spool solenoid valve
第二速电磁阀
second speed solenoid valve
第四档滑动齿轮
fourth speed sliding gear
第四档离合器组件
fourth speed clutch group
第四档同步器总成
fourth speed synchronizer assembly