闭曲面积分符号

青青子衿

当不使用\usepackage{esint}时

\begin{align*}

\subset\kern{-2.3pt}\supset\kern{-16.8pt}\iint\limits_{\,\large\Sigma}\\

{\large\subset}\kern{-2.1pt}{\large\supset}\kern{-17.4pt}\iint\limits_{\,\large\Sigma}\\

\bigcirc\kern{-13.5pt}\int\kern{-8.0pt}\int\limits_{\large\Sigma}\\

{\large{\bigcirc}}\kern{-15pt}\int\kern{-7pt}\int\limits_{\large\Sigma\,\,}

\end{align*}