Δ V A B = V B − V A , Δ V B C = V C − V B , Δ V C D = V D − V C , Δ V D A = V A − V D . If any questions arise related to the information contained in the translated website, please refer to the English https://jeanhdbq527959.blogvivi.com/33855455/indicadores-sobre-tela-soldada-3-metros-você-deve-saber