早奥陶世北祁连地区再次拉张，遭受第二次大洋化，到中奥陶世形成具沟弧盆体系的成熟大洋。
In early Ordovician North Qilian region again stretched and suffered second oceanization, up to middle Ordovician a mature ocean basin with a trough-arc-basin system already formed.
在各种膜结构体系中，张拉膜结构的应用最为广泛。
The application of tensioned membrane structure was the most extensive in all kinds of membrane structure systems.
装配式整体预应力板柱结构是采用预制的钢筋混凝土楼板和柱作为主要的受力构件，通过整体张拉预应力钢筋而形成的板柱结构体系。
Slab-column structure assembled by monolithic prestressing is a type of structure system in which prefabricated reinforced concrete slabs and columns are main members bearing load.
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