分析了导致混凝土强度不足的原因。
通常，他们使用的信号强度不足电视显像信号的千分之一。
In general, they have picked them up at signal strengths less than a thousandth of that needed to display an image on a TV screen.
对于已有的产品，CAE技术可以解决外观及强度不足等问题。
For the existing product, such defects as the appearance defect and strength being not enough can be solved by using CAE technology.
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