: Standard reviews check for copper weight, surface finish (like HASL or ENIG), and solder mask color requested by the user. Troubleshooting Archive Files

: The ".rar" extension indicates a compressed archive. It could be a specific dataset, software patch, or internal company document labeled "21460" for organization.

: The system detects the number of layers (e.g., a 2-layer board) and the physical dimensions (e.g., approximately 66.2 x 51.1mm).