必要交易品·必要交易品導水路網の建設aqueduct_system_constructionin_game/common/goods_demand/building_construction_costs.txt:216定義in_game/common/goods_demand/building_construction_costs.txt:216217masonry = 0.3218lumber = 0.25219tools = 0.15220stone = 0.3221category = building_construction