What is the "Arc Furnace" and why can I not find information about it?

What is the "Arc Furnace" and why can I not find information about it? - Self Care Isn't Selfish Signage

I've been crawling around various wikis and I see mentions of the "arc furnace" as if it were some sort of refinery above the 'refinery' option, but when I try to follow I wind up at error pages, or at 'Basic Refinery.' Was this an old name for the Basic, a discontinued entity, or something else?






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