短语词组短語rocker r bar furnace 搖杆推料爐rocker r bar 搖杆rocker -bar heating furnace 搖杆式加熱爐rocker bar furnace 搖杆推料爐rocker bar bearing 鉸鏈支座torsion -bar and rocker structure 扭杆搖臂 返回 rocker bar