The loop-shape stainless steel piece produced by the Shandong Iraeta Heavy Industry Co Ltd based in East China's Shandong province. [Photo/chinanews.com] JINAN -- A Chinese steel mill on Tuesday ...

JINAN, March 13 (Xinhua) -- A Chinese steel mill on Tuesday rolled off the world's largest seamless ring forging piece, which was developed especially as the key part of a nuclear power unit. The loop ...