By isualization the phased array pulse with a strobed photoelastic system the real picture can be seen.

使相控阵脉冲和系统，可以看到超声脉冲传的真实照片。

An application of three dimensional photoelastic stress analysis in a dam with drains for floatage at the Three Gorges Project is described.

叙述了三应力分析在三峡工程排漂孔坝段中的应用。