舵平衡部分长度与舵总长度之比的英文

length-balance ratio

• 舵:    rudder; helm
• 平衡:    balance; equilibri ...
• 部分:    part; section; por ...
• 长度:    length; longitude; ...
• 与:    take part in; part ...
• 总:    assemble; gather; ...
• 比:    2