In order to avoid the pollution of the extracting material and the inconvenience of fetching the plug, a rotating shielding door is used for the purpose of the horizontal tangential channel shielding.

水平切向孔道的屏蔽采用旋转屏蔽门屏蔽，避免了活化后塞子取出物污染空间及取放塞子的不便。

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Results: The main channel of atmospheric pollution and the law governing the changes in concentration were summed up and a proposal for the control of air quality in the compartments was advanced.

结果：分析归纳了舱室大气污染的主要途径及浓度变化规律；提出了舱室大气质量控制建议。

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The service agent of each pager station adopts the satellite channel to solve the conflicting of pollution and covering of radio wave.

为解决无线电波污染和覆盖之间的矛盾，各寻呼台服务商纷纷采用卫星链路方式。

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