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Manufacturing process of lightweight concrete of great strength and construction elements made of this lightweight concrete, in particular heat-resistant concrete formwork
Tensile member for beams, joists, lattice girders, columns, etc., in reinforced concrete, beams made with this tensile member, and process for its manufacture
Method for manufacturing reinforced concrete joists, joists manufactured by this process, special interjoists, and method for constructing reinforced concrete floors with these joists and interjoists