拖拉机变速箱操纵机构 tractor transmission control

变速箱手操纵机构 transmission hand control

变速箱开关操纵机构 transmission switch control

变速箱换档操纵机构 transmission shift control

变速箱液压操纵机构 transmission hydraulic control

变速箱液压操纵机构箱 transmission hydraulic control case

变速箱空档锁操纵机构 transmission neutral lock control

变速箱空档器操纵机构 transmission neutralizer control

变速箱操纵杆连杆机构 transmission control lever linkage