A very specific request!

: If a drawing uses this font and it is not installed on the system, AutoCAD will display a "Missing SHX files" warning and substitute it with a generic font like simplex.shx PDF Exporting

For standard Latin fonts, these are simple sticks and curves. For tai font 3t-unicode.shx , the definitions must accommodate:

When you open an SHX file in a text editor (not recommended), you see hexadecimal and ASCII vectors. Each character is defined as a series of pen-up/pen-down movements. For example:

These SHX fonts are preferred over TrueType fonts (TTF) in engineering because they plot faster and their line weight can be controlled by layer settings or plot styles. Tải Font 3t-unicode.shx - Google Docs Tải Font 3t-unicode. shx - Google Drive. Google Docs Unicode SHX Fonts | Autodesk Civil 3D