: The standard vector images used by PCB manufacturing software to describe the layout of the circuit board (copper layers, solder mask, drill data, etc.).
The reference to and "topic 24146" appears to correspond to a specific project file on PCBWay , a platform for custom Printed Circuit Board (PCB) manufacturing. 24146.rar
: Specific instructions for the CNC machines to create holes in the board. : The standard vector images used by PCB
If this is not related to PCB manufacturing, "Topic 24146" occasionally appears in other specialized databases: 24146.rar