亚洲精选国产丨欧美福利专区丨色久悠悠婷婷综合在线亚洲丨中文有码亚洲制服av片丨精品亚洲成a人片在线观看少妇丨亚洲影视精品丨中文字幕精品久久久乱码乱码丨五月天丁香久久丨www.男女丨双乳被老汉揉搓a毛片免费观看丨久久爱网丨国产日韩不卡丨天天色av丨午夜色大片丨国产三级做爰在线播放五魁丨亚洲天堂日韩精品丨av基地丨亚色av丨国产精品普通话国语对白露脸丨国产熟睡乱子伦视频观看软件丨日韩欧美中文字幕一区二区丨heyzo国产丨无码av天天av天天爽丨天天射中文丨xxnn成人免费视频

After couples of years of research and development, we made the open closing die heading machine which can produced many different types of fasteners and hardware such as multi-step, double-cap, double-head and so on. It greatly lowers the production cost for our clients, that the hand-made, semi-automatic produced hardware and axle components can be produced automatically by machine, therefore the production efficiency is highly enhanced.