Chemicals
| Wed 26 Aug 2026
Beijing, Aug. 26 -- Hangzhou Chenrui ASU Manufacturing has been granted a patent for Nitrogen Liquefaction Device Convenient to Maintain. Li Qing, Wu Yutao, Peng Xuxia, Sun Zhiqiang, Li Zhen, Jiang Chengtao, Sun Liangjun, Tang Jianbo, Sheng Yihai, Lu Junjun, Wang Yongjian and Huang Mei developed the invention.
The patent appl..