短语词组短语pitman n arm 转向摆臂steering pitman arm 转向舵盘pitman arm upper bearing 转向垂臂上轴承pitman arm west bank 摇臂double -ball pitman arm 双球连接杆臂trim angle of pitman arm [车辆]转向垂臂后倾角ARM PITMAN 转向臂 返回 pitman arm