A lot of things are copied in a form, the circular coil, it is no exception, now it is understood that in the superconducting field to achieve a revolutionary breakthrough, the first high temperature superconductor Bi-22122 is made into the most suitable for the manufacture of high field magnets round wire, the technology has long cited a lot of superconducting class of business. Bi-2212 is a kind of strong magnetic material containing metal bismuth. It is a circular coil form, it can be twisted into yarn. The revolution of the circular coil and pushed on the first floor, the development of circular coil is a lot of entrepreneurs are particularly optimistic about one. Pretty little guy.