[0.15.x] Incorrect tree of recipes.

[hauk70]

Having studied the tank building, we can create tank shells, but to create them requires an explosive, which I have not yet explored. I think getting access to the tank building research is necessary after exploring the explosives.

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ru

Изучив танкостроение мы можем создавать танковые снаряды, но для их создания необходима взрывчатка, которую я еще не исследовал. Я думаю получать доступ к исследованию танкостроения необходимо после исследования взрывчатки.

[Rseding91]

These "discrepancies" are by design. If every technology recipe unlock had the prerequisite recipe-technology the technology graph would be an unreadable web