According to the need of net for the faraway education, people begin to adopt some skills about the double control and insertion. So we regularly achieve the applicable insertion campus net.

根据远程教育对网络的需求，采用了双控技术以及嵌入式技术等，实现了实用性嵌入式校园网。

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Zip insertion by the semi concealed method is very similar to the double lapped seam.

用（半隐蔽）的装拉链方法与双搭缝非常相似。

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