${\displaystyle {\begin{array}{c}{\text{(temperatura de fluidez)}}\\T_{f}\\{\begin{array}{c}\qquad \qquad \\\hline \\\end{array}}\vert \xrightarrow {\qquad \qquad } \\\underbrace {\ \qquad \ \qquad \ } _{\text{Sólido}}\ \underbrace {\ \qquad \ \qquad \ } _{\text{Líquido}}\end{array}}}$

In your article, replace the image with:

<math>\begin{array}{c}
  \text{(temperatura de fluidez)} \\
  T_f \\
  \begin{array}{c}
    \qquad\qquad \\
    \hline \\
  \end{array}
  \vert
  \xrightarrow{\qquad\qquad} \\
  \underbrace{\ \qquad \ \qquad\ }_{\text{Sólido} }\ \underbrace{\ \qquad \ \qquad\ }_{\text{Líquido} }
\end{array}</math>

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