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EstacasIncopre · 2020. 10. 8. · NBR 16258:2014-ESTACAS PRÉ-FABRICASDAS DE CONCRETO; 3- Concreto fck≥40,0MPa; 4- AÇO CA50 (estribos), AÇO CP175RB (armadura longitudinal); 5-
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