Metal & Mining
| Mon 17 Aug 2026
Beijing, Aug. 17 -- Shanxi Lingzhida Coal Ind Co Ltd has been granted a patent for Retaining Wall Support for Filling and Mining. This invention was developed by Li Yun, Niu Weijie, Li Pengfei, Wang Cong, Yang Pengfei, Wang Ke, Yang Ming, Wang Xincheng, Zhang Hongfeng, Chen Weiwei, Cui Honggang, Zhao Leilei, Han Feiyang, Li Zhuo..