Graphite carbon spheres typically refer to mesophase carbon microbeads (MCMB) or graphitized carbon spheres. They are micron-sized spherical carbon materials prepared through special heat treatment or chemical methods, possessing excellent physicochemical properties such as high electrical conductiv

The concept of third rail power supply is to add a live rail in addition to the two rails on which the train runs. This live rail is usually set between the two rails or on the outside of one of the rails. The collector of the electric train contacts and slides on the live rail to transmit electrici