Retail & Household
| Sun 26 Apr 2026
Beijing, April 27 -- Zhengzhou Coal Mining Machinery Group has applied Chinese patent for Ultra-large-cylinder-diameter Hydraulic Support Stand Column Circular Seam Deep Groove Narrow Gap Welding Method. Cheng Xiangbang, Qin Shibin, Yang Faqi, Li Zheng, Zheng Fengbo, Shi Zhiye, Feng Junwei, Ji Lei, Zheng Yucong, Wang Yingying, Z..