凹陷深度越大，初始轴向拉伸力的存在对立管的影响越大。
The axial tensile had greater influence on the ultimate strength of the dented riser as the depth was deeper.
结果表明：最大凹陷深度的增加使立管的疲劳寿命大大减少；
The results showed that:fatigue life significantly reduced as the maximum depth of dent increase;
侧线器官的分布密度、大小和凹陷深度明显与周围表皮的厚度和不同部位有关。
The density, size, sunk depth of the lateral line organs directly correlated with surrounding epidermal height and regions.
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