这是本文档旧的修订版！
https://graphviz.org/
https://plantuml.com/
https://mermaid.js.org/ https://cdn.jsdelivr.net/npm/mermaid@9.2.2/dist/
https://schemdraw.readthedocs.io/en/latest/gallery/ic.html
https://wavedrom.com/tutorial.html
https://www.syncfusion.com/blogs/post/digital-logic-circuit-javascript.aspx
https://gojs.net/latest/download.html
