1　引言近几年塑钢门窗在国内方兴未艾 ,传统的塑钢门窗都是推拉窗 ,其气密性和开启方式等方面存在一些缺陷。随着人们生活水平的提高 ,平开翻转窗开始进入市场。平开翻转窗和推拉窗的结构区别在于五金件上 ,目前国内平开翻转窗五金件主要从国外进口。北新建材集团有限公司 2 0 1 Introduction In recent years, steel doors and windows in the ascendant in China, the traditional steel doors and windows are sliding sash, its gas-tightness and opening methods, there are some shortcomings. As people’s living standards improve, flat-flip windows begin to enter the market. Flat open flip and sliding window structure is the difference between the hardware, the current domestic flip open window hardware mainly imported from abroad. North New Building Materials Group Co., Ltd. 2 0