1)brake control valve pressure switch,制动器控制阀压力开关2)parking brake/travel stop pilot control valve pressure switch,停放制动器/行驶停止先导控制阀压力开关3)brake pressure switch,制动器压力开关4)parking brake pressure switch,停放制动器压力开关5)Pressure control switch,压力控制开关6)switching control pilot,开关控制阀