短语词组短語rotary elbow joint 活動肘關節rotary y joint 鏇轉連接rotary steam joint 鏇轉式汽琯接頭annular rotary joint 環狀鏇轉接頭rotary joint trouble 鏇轉接頭故障air rotary joint 鏇轉接頭optical rotary joint 光鏇轉連接器Waveguide rotary joint 波導鏇轉關節 返回 rotary joint