The natural frequency is an important parameter of building, it reflects the structural dynamic feature and lays the foundation of seismic design.
频率是结构固有的重要参数，它反映了结构的动力特性，也是结构抗震设计的重要基础。
Especially the "Guitar equipped structural design knowledge" because of their knowledge update feature through the site for quality packaging, state-building courses is the best option.
特别是《结装结构设计》知识，因其自身知识更新快的特点，通过网站进行包装结构国家精品课程的建设无疑是最佳的选择。
Especially the "Guitar equipped structural design knowledge" because of their knowledge update feature through the site for quality packaging, state-building courses is the best option.
特别是《结装结构设计》知识，因其自身知识更新快的特点，通过网站进行包装结构国家精品课程的建设无疑是最佳的选择。
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