The numerical computation of the result of vertical - horizontal combined seepage draining system of tailings dam built by up - stream method was studied.

对上游法尾矿坝垂直水平联合排渗系统，排渗效果的数值计算进行了研究。

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When combined with competent law enforcement, surveillance cameras are more effective, less intrusive, less psychologically draining, and much more pleasant than these alternatives.

CNN: After Boston: The pros and cons of surveillance cameras