亚洲人成咪咪爱一区二区中文_青青国产成人久久91网_国产精品一区三区无码毛片_免费亚洲欧美精品_天堂网日本一区二区_h漫在线免费观看_一级毛片电影_老子午夜精品无码野草综合_欧美日韩国产综合视频_波多野结衣亚洲色播

    Zhejiang zijinwang Technology Co., Ltd, established in 2019, is located in Sanmen County, Taizhou City, adjacent to Dawan District, Hangzhou Bay, with a registered capital of 20 million yuan. As a wholly-owned holding subsidiary of Sanmen Tongshun rivet Co., Ltd., the enterprise formerly known as Shenzhen zijinwang Technology Co., Ltd., relies on the parent company's more than 30 years of fastener R & D and production experience, and cooperates with the national iron and steel material testing center, the school of mechanical engineering of Zhejiang University, the Research Institute of railway and urban rail transit of Shanghai Tongji University, the school of material science and engineering of South China University of technology The school of mechanical engineering of Hangzhou University of Electronic Science and technology has established a long-term cooperative relationship between industry, University and research, conducted experimental analysis and Research on the self tightening principle, and is committed to the design, R & D and production of never loose fasteners, self tightening wrenches and self tightening series products.