革新革新本版本变更炼钢厂steel_mill_advancein_game/common/advances/1_building_unlocks.txt:603高炉技术与冶炼工艺可靠性的提升，使得大规模冶炼钢成为一项规模经济的产业。需要工业革命革新requires革新树工业革命炼钢厂铁路罗马涅之路定义in_game/common/advances/1_building_unlocks.txt:603604age = age_6_revolutions605research_cost = -0.75607unlock_building = steel_mill609requires = industrialization_advance
工业革命革新requires
工业革命革新requires工业革命革新requires