英语语法分析

Practice shows that both ovality and eccentricity affect the casing collapse resistance obviously.

实践证明，不圆度和壁厚不均度对套管抗挤强度的影响是相当可观的。

Casing, cement and formation plane strain mechanical model are established, considering casing with initial ovality.

针对套管的不同初始椭圆度建立了套管、水泥环、地层平面应变力学模型。

The cross-section distortion of bent tube is very small by using ball filler push bending process, with the ovality less than 1.5%.

运用珠粒填料推弯成形工艺成形出的管材截面畸变程度很小，椭圆度不超过1.5%。