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介绍与传统设计手法不同的“大跨预应力次梁楼盖结构体系”，并对该体系结构中结构布置、主梁设计、预应力次梁设计予以介绍说明。
Introduce the “large-span prestressed secondary beam floor structure system” that is different from traditional design methods, and introduce the structure arrangement, main beam design, and prestressed secondary beam design in the system structure.