兰州7323工厂今年开发出推拉空腹钢窗和保温节能双层玻璃窗,均为推拉式,不仅改变多年单一平开窗状况,而且这两种窗从保温节能着眼,减少了传热耗量与渗透耗热量,尤其双层玻璃窗,对严寒的西北等地区更为适用, The Lanzhou 7323 factory has developed push-pull fasting steel windows and energy-saving double-glazed windows this year. All of them are push-pull type, which not only changes the status of single-glazed windows for many years, but also reduces the heat transfer consumption and penetration by focusing on heat preservation and energy conservation. Heat consumption, especially double-glazed windows, is more applicable to cold regions such as Northwest China.