RESÍDUOS

Os Rs que valem

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https://www.google.com.br/search?q=5+Rs&espv=2&biw=1366&bih=601&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiWyIif9_DLAhVIh5AKHd67AvEQ_AUIBigB