RUL file extension - Gerber format file
What is rul file? How to open rul files?
File type specification:
The rul file extension is associated with the Gerber format.
Gerber File is a file format used by printed circuit board manufacturing machines to layout electrical connections such as traces, vias, and pads (the component footprints on the PCB). In addition, the file contains information for drilling, and milling the completed circuit board.