CAD type too much (including civil engineering, interior spring design, motor, machinery manufacturing and many other), a beginner how to choose?
Extrusion plate (XPS) is a polystyrene resin or its copolymer as the main component, add a small amount of additives, made by heating and extrusion with a closed-cell structure of the rigid foam
The concrete structure has been included in the structure, but the concrete structure is a concrete structure, but the structure is just a frame structure without concrete structure; another steel structure and concrete structure is a good idea but to do Less, the third floor is said to be the main structure of the original structure, masonry works using concrete, then this will undoubtedly increase the cost of the house, if not very high floor or earthquake area is clearly not economical
