Printing & Publishing
| Tue 02 Dec 2025
Beijing, Dec. 3 -- Qingyuan Hualv Environmental Prot Equipment Co Ltd has been granted a patent for Machining Equipment for Metal-free Filter Cartridge Sweat Soldering. This invention was developed by Zeng Xianfu, Yu Shaoyi, Qian Dingzhao, Dai Yunfeng, Wen Jiefeng, Li Jiajun, Huang Long, Zeng Yanghuang, Teng Wengang, Liu Junru a..