我国建筑物的门窗历经了木门窗、钢门窗、铝合金门窗．塑钢门窗几个发展阶段。从9O年代开始随着我国经济与技术的发展和人民消费水平的提高，以及人们对PVC塑料门窗认识的提高，塑钢门窗以其款武多样．典雅大方不仅广泛应用于各类 Doors and windows of Chinese buildings have experienced wooden doors, windows, and aluminum alloy doors and windows. Plastic steel doors and windows at several stages of development. From the beginning of the 90’s, with the development of China’s economy and technology and the improvement of people’s consumption levels, and people’s awareness of PVC plastic doors and windows, PVC doors and windows are becoming more and more diverse. Elegant and generous not only widely used in various types