Seamless sliding contact line is a kind of *power-off-free sliding contact line with no joints in the middle. It uses oxygen-free copper (conductivity up to 99.99%) to transmit power, with thick copper conductors (generally standard thickness 2.8m/m×10W), low voltage drop, and excellent conductivity; it can be equipped with a safety power rail of the same length according to the user's workshop length or needs, so that the entire workshop is safely powered without any interfaces in the middle, truly solving the problem that domestic sliding lines often get stuck with collector brushes due to too many joints, causing short circuits or inability to operate. It is also suitable for designs with curves, arcs, and high-low movement. This makes the entire overhead crane project beautiful, tidy, and safe. In the realm of automated production, it is the *best choice for power supply systems.