| 摘要 |
PURPOSE: To suppress the electrolytic corrosion of a steel rudder plate caused by a rudder stock made of stainless steel. CONSTITUTION: In a ruder which is taper-fitted and fixed to a steel rudder plate hub 18 on which a rudder stock 10 made of stainless steel is formed on a rudder plate, an O-ring 36 to seal the rudder stock 10 is provided on the rudder plate hub 18, a sub O-ring 40 to similarly seal the rudder stock 10 is provided above the O-ring 36, and the sub O-ring 40 is pressed by a steel hub cover 42 to be removably flitted to the upper end face of the rudder plate hub 18. |
