Is any simple way to draw torus with cross-section and cut like in picture?
\documentclass[tikz]{standalone}
\usetikzlibrary{shapes}
\begin{document}
\begin{tikzpicture}
\node [draw, cylinder, shape aspect=6, rotate=90, cylinder uses custom fill, cylinder body fill=lightgray!20, minimum height=1cm, minimum width=4cm] at (0,0) {};
\node [draw, cylinder, shape aspect=4, rotate=90, minimum height=1cm, minimum width=3cm] at (0,0.2) {};
\end{tikzpicture}
\end{document}