Steel
| Sun 01 Nov 2026
Beijing, Oct. 31 -- Jilin Lianhua Pipe Ind Co Ltd has secured a patent on Socket and Spigot Joint Corrugated Reinforced Spiral Steel Pipe. Fei Zhengrong, Wang Quanyi, Zuo Wenjie, Gao Shiwen, Fang Yuqiang, Wang Qingrui, Shi Liangliang, Chen Chung-chu, Fei Minjian, Xu Longjie, Liu Shuqi, Bai Jiantao and Cheng Fei developed the inv..