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。
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。
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。
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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