Jinggong is roll forming machine manufacturer in China, steel structure machine supplier since 1968, offer steel panel machine for forming construction materials of PU and EPS sandwich panels, steel deck, steel tile and C Z purlins. We also offer welding machine and shot blasting machine for processing metal beam and steel. We are OEM of steel construction machine, high precision forming machine in making thermal insulation panels. We have one year warranty for steel forming machine, CE certifie