Beijing, March 31 -- Sinohydro Bureau 14 has submitted a patent application for Construction Method for Blocking Water Leakage of Rock Pipe-jacking Tunnel Portal. This invention was developed by Li Liang, Xu Yun, Zhang Rui, Miao Yuchun, Ma Fubin, Zhao Hongxiang, Chen Zhongyin, Xiong Zubing and Nie Zhihong. The patent applicatio..

Beijing, March 31 -- State Intellectual Property Office of China has published Sinohydro Bureau 14 patent application for Temporary Plugging Device for Water Closing Test of Large-span Arc-shaped Steel Gate. The invention was developed by Lei Jianguo, Zhang Xingwang, Tan Jianguo, Wang Xiangsen, Cui Long, Zhang Shuai, Shu Kaishun..