革新革新本版本变更皮革厂tannery_mill_advancein_game/common/advances/1_building_unlocks.txt:551通过采用新型化学制剂与更高效的生产方法，我们的皮革产量将无可匹敌。需要冲天炉冶炼工艺革新requires革新树工业革命热风高炉冲天炉冶炼工艺皮革厂船具厂定义in_game/common/advances/1_building_unlocks.txt:551552age = age_6_revolutions553research_cost = -0.75554unlock_building = tannery_mill555requires = cupola_smelting
冲天炉冶炼工艺革新requires
冲天炉冶炼工艺革新requires冲天炉冶炼工艺革新requires