Pipe truss by purlin , even between a beam and the whole structure by supporting system.
管桁架之间通过檩条、连系梁和支撑系统把整个结构连成整体。
Other elements were subsequently joined to the station, with the overall plan calling for a complex of laboratories and habitats crossed by a long truss supporting four large solar power arrays.
紧接着将其它的组件加入太空站，整个计划需要组装综合实验室和居住空间，交错在绵长的构架支撑四片大型太阳动力数组。
Unlike a vault, the truss exerts no thrust But only downward pressure; supporting walls require no Buttressing or extra thickening.
同拱顶不同的是桁架不承担推力而只承担向下的压力，不需要扶壁或其它特别的加固物来支撑墙体。
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