The results show that pollutants removal performance of the system constructed by the mixed packing medium with equal volume proportion of bricks and ceram waste is the best of the four systems.

结果表明，以等体积掺混废砖块和废陶获得的混合填料构建的人工湿地系统，在处理含高浓度和低浓度有机污染物的河水时均表现出良好的除污效果。

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According to needs and delivery medium, can be used two kinds of mechanical seals and packing seal, and the structure of these two kinds of interchangeability.

根据需要和输送介质，可采用机械密封和填料密封两种，且这两种结构具有互换性。

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Packing is an indispensable part as well as a major medium for promotion of the image of an enterprise.

包装是企业形象中不可缺少的一个重要组成部分，是体现传播企业形象的一个重要媒介物。

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