Precept 2 : gabled frames , analyzed by soft 3D3S ;
方案二：门式刚架结构，采用3D3S软件计算；
The theory and method of this paper have been successfully adopted in the developing of the large general CAD system for space steel structures & 3D3S .
这一技术已成功应用于空间通用钢结构软件3D3S的后处理。
3d3s