contraction of cross sectional area的意思|示意

The results of performance measurement test show that tensile-strength, contraction of cross sectional area, elongation percentage, dynamic ductility of the weld all exceed their base metal.

焊后试件的性能测试结果表明，焊接接头的拉伸强度、断面收缩率、延伸率及冲击韧性均已超过母材。

Time dependent calculation for a suddenly imposed pressure gradient has shown that variation of the cross sectional area reduces inertial effect in the contraction flow region.

压力差为阶跃变化的情况下数值计算结果说明了收缩部的断面积的时间变化减少了收缩部的惯性效果。