Tools and Machinery
| Mon 11 May 2026
Beijing, May 11 -- Henan Polytechnic University has sought patent for Drilling, Sealing, Grouting and Pressurizing Device. This invention was developed by Si Leilei, Zhao Tongyu, Wei Jianping, Wang Yinghui, Yao Banghua, Li Bo, Wen Zhihui, Wang Mian, Hua Mingguo, Wang Dengke and Zhang Hongtu.
The patent application number is C..