Unknown macro: {latex}
\huge[
h_{\text{f}} = {\text{f}}\frac
Unknown macro: {8}
{{g\pi ^2 }}\frac{{LQ^2 }}
{{D^5 }}
]
\huge[
h_{\text{f}} = {\text{f}}\frac
{{g\pi ^2 }}\frac{{LQ^2 }}
{{D^5 }}
]