space truss purlin 空间桁架檩条
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。
According to the material and disposition, the roof of common steel roof truss mill building divides into steel purlin roof and roof without purlin.
普通钢屋架结构厂房的屋盖根据屋面材料和屋面布置情况，可分为无檩屋盖和有檩屋盖。
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