Printing & Publishing
| Wed 14 Jan 2026
Beijing, Jan. 14 -- Offshore Oil Engineering has sought patent for Intelligent Door Frame Type Line-drawing Ink-jet Printer. This invention was developed by Ai Wei, Zhang Yaxi, Yang Chaohui, Zhang Zeqing, Li Shusheng, Liu Chao, Geng Xiaomin, Du Yongheng, Lian Pengzhong, Li Ning, Jia Xueqing, Liu Ming, Meng Qiang and Fu Yanning.
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