annular opening meaning in Chinese

圆孔

The large - span annular open - web cable truss structure is a new type of tensile structure based on cable dome . especially it is suitable for awning structures of palestra . little research work on this type of structure has been done abroad , and at home the research is blank
大跨度环形空腹索桁结构体系是继承于索穹顶结构、近年来才出现并应用于实际工程的新型结构体系，具有显著的特点，特别适合应用于体育场的罩棚结构。
First , based on the reading of a lot of literatures , a view of the history of tensegrity structures and cable dome structures is put forward in this paper , as well as the expatiation of the architectural and structural property on the large - span annular open - web cable truss structure . several projects are also presented
首先，在大量查阅国内外文献的基础上，本文回顾了张拉整体以及索穹顶结构的发展历史，阐述了大跨索桁结构在建筑和结构上的特点，介绍了几项典型的工程。