必要交易品·必要交易品港の建造物の建設port_building_constructionin_game/common/goods_demand/building_construction_costs.txt:327定義in_game/common/goods_demand/building_construction_costs.txt:327328masonry = 0.1329naval_supplies = 0.2330tools = 0.2331lumber = 1.0332category = building_construction