the property possessed by a round shape that is flattened at the poles;
"the oblateness of the planet"
例句
用作名词(n.)
The ellipticity only influences casing damage caused by outer extruding force.椭圆度仅对均匀外挤压力导致套管破坏有较大影响。
In the previous works only the uniform wall-thickness elbows were studied.However, the elbow thickness is varied with the bending radius and ellipticity on the cross section.以往对弯头的研究只考虑壁厚均匀不变的情况，但是实际上弯头的壁厚是沿着弯曲半径变化的，并且弯头的截面也具有一定的椭圆度。
