Packaging & Containers
| Wed 13 May 2026
Beijing, May 13 -- Shanxi Aerospace Qinghua Equip Co Ltd has submitted a patent application for Oil Leakage Control Method for Welding Seam of Oil Tank. This invention was developed by Yang Yongfang, Zhang Yi, Jia Yanping, Liu Guangjuan, Li Chenda, Fu Wenping, Li Xuguang, Feng Zhenhua, Lin Bingqian and Song Hao.
The patent ap..