短語詞組短語ball joint arm 球接頭連臂Roll of ball toss arm 拋球手臂轉(zhuǎn)動(dòng)double -ball pitman arm 雙球連接桿臂governor ball arm 調(diào)速器球桿ball -bearing arm support 滾珠軸承式手臂支具ball rolls on one arm 單臂滾球steering arm ball stud 轉(zhuǎn)曏臂球頭柱螺栓steering arm ball 轉(zhuǎn)曏桿球耑arm link ball joint 連桿球節(jié) 返回 ball arm