The depositing surface of soil-retaining DAMS has certain vertical gradient, the tail exists obvious phenomenon of "raising tails".

淤地坝淤积面有一定的纵比降，尾部存在显著的“翘尾巴”现象。

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The high-aspect-ratio flying wing eliminates vertical tail and conventional rudder, and uses instead a split drag rudder with large deflection as its directional control surface.

大展弦比飞翼布局飞机取消了垂尾和常规方向舵，通常采用大偏角的开裂式方向舵作为偏航操纵面。

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