下载地址：https://www.opencascade.com/products/cad-assistant/

运行 cad_assistant_1.6.0_2021-10-05_lin64.appimage

提示

This application failed to start because it could not find or load the Qt platform plugin "dxcb;xcb"
in "".Available platform plugins are: xcb.Reinstalling the application may fix this problem.
This application failed to start because it could not find or load the Qt platform plugin "dxcb;xcb"
in "".Available platform plugins are: xcb.Reinstalling the application may fix this problem.

打开终端先运行：export QT_QPA_PLATFORM=xcb

就可以正常打开