短语词组短語fractured tie -bolt 斷裂的貫穿螺栓tie -down bolt 系緊螺栓hydraulicdevice for tightening tie -bolt 貫穿螺栓上緊用液壓裝置hydraulic device for tightening tie -bolt 貫穿螺栓上緊用液壓裝置 返回 tie-bolt