选择一个港口自动过滤器的事件表明，只有那些有针对性的在那个港口。
Selecting a port automatically filters the events to show only those targeted at that port.
我国过滤材料经过几十年的研究开发，其种类不断增加，并更具有专用性和针对性。
After worked over tens years, the sorts of filtration material have been continually increasing with specialization and pertinence in our country.
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