短语词组短語rotor s critical speed 轉子臨界轉速rotor r critical speed 轉子臨界轉速rotor ' s critical speed 轉子臨界轉速rigid -rotor-mode critical speed 剛性轉子振型臨界轉速First critical rotor speed 第一個關鍵的轉子速度critical rotor speed 臨界轉速 返回 rotor critical speed