University of Science and Technology Beijing's new revised undergraduate admission letter made a stunning debut, the admission letter is made of super thin steel foil (also named 5G steel).
The 5G steel thickness up to 0.07mm is mainly 5G base station signal receiver, signal transmission filter, integrated circuit board and other sector. The research and development and production of this thin piece of steel is the embodiment of a number of technologies - ultra-thin specifications of tiny inclusions efficient control technology, ultra-thin specifications of acid continuous rolling high-speed variable thickness stable threading, plate shape control technology, ultra-thin specifications large width-to- thickness ratio secondary cold rolling technology, etc.
