Metal & Mining
| Thu 22 Jan 2026
Beijing, Jan. 23 -- Wenzhou Huahai Sealing Co Ltd has sought patent for Machining Equipment and Method for Metal Sealing Element. This invention was developed by Hu Bingyi, Du Yusi, Zhou Junjie, Wang Haodong, Ai Shangjun, Huang Zhongming, Jiang Dongheng, Li Kaizong, Zhang Yong and Zhang Yuefei.
The patent application number i..