non ferrous metals and its alloys

Zhengzhou Protech Technology Co., Ltd-owned by Protech(China) Holding Litmited, is founded a group of technology enthusiastic people who are devoted to probing the newest and innovation in different fields, serving various clients worldwide for its applications. We have our own ...

Beijing Gao Ye Tech Co., Ltd is approved by the State Administration for Industry,located in Hightech Park Haidian District. Take quality and reputation first as operating principle,Quality life , Integrity cornerstone,tenet of our company.Company relying on Aviation Industry ...