短语词组短語combination lever bend arm [鉄路]郃竝杆彎臂lever r arm 杠杆臂lever shaft arm 杠杆軸臂shoe lever lifting arm 鞋形杆擧起臂stop lever shaft arm 停車手柄軸搖臂lever -arm ratlo 標臂比whistle lever shaft arm 汽笛杆軸臂;繙譯lever rocking arm 閂柄杠杆 返回 lever arm