Pipe
| Wed 16 Sep 2026
Beijing, Sept. 16 -- The Fourth Engineering Co Ltd of China Raiway First Group and Xi'an Changtie Building Eng Co Ltd have obtained a patent for concrete pump pipe cleaning device. This invention was developed by Fan Jin, Qi Ding, Heng Lei, Wang Lijun, Zou Chao, Cao Zhanfeng, Zhu Ruwei, Li Bin, Wang Minjie, Zhang Yabing, Ke Yuet..