短語詞組短語Stern -shaft 關(guān)鍵詞尾軸stern tube shaft 艉琯軸;艉軸ship stern -shaft mechanical seals 船用艉軸機(jī)械密封withdrawal of stern shaft 拉出艉軸stern shaft hub 艉軸套stern shaft accident 尾軸事故Stern shaft sealing device 艉軸密封裝置stern shaft break 艉軸斷損 返回 stern shaft