This year, a huge circular bore is to be lowered into a layer of sand deep beneath the city, where it will drill a tunnel to link them.
今年，就要在城市地下深处的砂层打通一个巨大的圆形隧道，把地铁站连起来。
If the section is a circular arc in the spatial slanting plane, the circular arc is the extremely reasonable bore hole path curve for slide drilling in minimum curvature method.
在此方法中，假设井段是空间斜平面上的圆弧，对于滑动钻进方式，圆弧是非常合理的井眼轨迹曲线。
Due to the shape character of rectangular bore containers, the equation for circular containers is no longer adaptable. Shrinkfitting pressure is usually calculated by FEM.
由于扁挤压筒的形状特点，厚壁圆筒的接触应力计算公式不再适用，通常采用有限元方法进行分析计算。
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