Group 1 - The State Intellectual Property Office of China granted a patent for a "bad geological tunnel shield tunneling machine and its support method" to several companies including China Railway Jingcheng Engineering Testing Co., Ltd. and China Railway 22nd Bureau Group [1] - China Railway Jingcheng Engineering Testing Co., Ltd. was established in 2015 with a registered capital of 50 million RMB and has participated in 15 bidding projects, holding 38 patents and 11 administrative licenses [1] - China Railway 22nd Bureau Group Fourth Engineering Co., Ltd. was founded in 2001 with a registered capital of 501 million RMB, participating in 3,345 bidding projects and holding 138 patents and 155 administrative licenses [1] Group 2 - China Railway 22nd Bureau Group Co., Ltd. was established in 1998 with a registered capital of 2 billion RMB, having invested in 73 companies and participated in 5,000 bidding projects, holding 1,402 patents and 582 administrative licenses [2] - Beijing Seoul Engineering Technology Co., Ltd. was founded in 2005 with a registered capital of 10 million RMB, participating in 8 bidding projects and holding 78 patents and 15 administrative licenses [2]
中铁京诚等公司取得不良地质隧道护盾式盾构机及其支护方法专利
Sou Hu Cai Jing·2025-07-29 04:20