The monitored impact shows that the ground freezing method is a reliable construction way to cross seamlessly a metro station in soft soil during execution of a cross-over project.

实践表明，冻结法是软土中地铁站零距离交叉穿越施工的可靠工法。

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Metro networks have phone gear like digital cross-connects, which manage high-and low-speed traffic, and synchronous optical network (Sonet) systems, which come from fiber-optic phone networks.

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