Iron Plates
Estimated Time 2 Hours
Level 1
Costs 2x Books
New Building(s) Manual Iron Refinery
Iron Plates 2
Estimated Time 3 Hours
Level 2
Costs 2 Books
Requirements Iron Plates
New Building(s) Iron Refinery
Iron Plates 3
Estimated Time 4 Hours
Level 3
Costs 2 Books
New Building(s) Iron Refinery II
Iron Plates 4
Estimated Time 6 Hours
Level 4
Costs 2 Books
Requirements Iron Plates 3
New Building(s) Iron Refinery III
Iron plates are a fundamental building material for machinery.  It's vital that we can make our own.

–In-game description

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