النتائج (
الإنجليزية) 2:
[نسخ]نسخ!
The design of structures for buildings and bridges is primarily concerned with providing and supporting carrying horizontal surfaces. With the exception of some long-term structures, these floors or surfaces are usually made of reinforced concrete, because no other materials provide a better combination than low cost, high strength, corrosion resistance, corrosion and fire.
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