色播婷婷电影综合社区,AV女优不卡亚洲在线,99999AV,日韩人妻中文字幕视频,国产拍自偷,91人人妻,超碰在线81,免费福利视频一区,九草青草原在线看

Xinxiang Qixing Welding Material Co., Ltd,We mainly produce “Qixing” brand of copper-based, silver-based, aluminum-based brazing & soldering materials, flux and other related products. Our company approved by ISO9001:2008 quality management system certification and ISO4001:2004 environment management system certification. And all of the products meet SGS and ROHS directive requirements. The new green brazing materials which were research and develop by ourselves, were popular with our customers, they can reduce the production cost for our customers. We have long-term relationship with many domestic colleges and universities, with strong technical force, advanced production equipment, perfect quality testing equipment and strict quality control system, we also can develop new types of brazing materials according to customers' demands.