Rest of airframe welded steel tube, with pilot and fixed fin at rear and engine and fuel tank at front, resting on two pontoons of rubberized fabric.
其余机身焊接钢管，与飞行员，在后方，发动机和燃料箱固定鳍在前面，胶布的两个浮筒休息。
Sailboats have many different types of fixed keels, such as full keels (see photo) and fin keels.
帆船有许多种不同类型的固定龙骨，例如全龙骨(见上图)及鳍板。
Fixed the fin shape, adding the fin thickness is not an effective way to increase the efficiency.
在肋片外形不变的条件下，增加肋片的厚度来提高辐射器的散热性能并不是经济的途径；
Fixed the fin shape, adding the fin thickness is not an effective way to increase the efficiency.
在肋片外形不变的条件下，增加肋片的厚度来提高辐射器的散热性能并不是经济的途径；
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