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$AB\stackrel{/\mkern-4mu/}{\raise-.5ex\hbox{=}}CD$
\documentclass{article} \newcommand\px{\mathrel{/\mkern-5mu/}} %平行 \newcommand\pxeq{\mathrel{\vcenter{ %平行且等于 \ialign{\hfil##\hfil\crcr $\scriptstyle\px\!$\crcr \noalign{\nointerlineskip\vskip1pt}$=$\crcr}}}} \begin{document} $AB \px CD \pxeq EF$ \end{document}
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2025-4-20 22:09 GMT+8
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