Gauss Rail Factory
This drawing depicts all the mines and factories (rectangles) and trade goods (ovals) needed to set up a player production chain for Gauss Rails.
The ovals in blue are trade goods that can't be manufactured by the player - they must be sourced throughout the galaxy at trading posts etc., or delivered by npc ships. The Blue ovals can now produced by the player.
The yellow ovals are trade good generated within the chain, but not used to produce Gauss Rails. These goods can be sold or used in other chains.