gerbv: gerbv (A Free/Open Source Gerber Viewer)
gerbv: 
gerbv: Gerbv is a viewer for Gerber RS-274X files, Excellon drill files, and
gerbv: CSV pick-and-place files. Gerber files are typically output by a PCB
gerbv: CAD tool (such as the gEDA Project's PCB), and are sent to a PCB
gerbv: manufacturer who uses the files for manufacturing Printed Circuit
gerbv: Boards (PCBs).
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