The power transmission system (1) of the trolley (100) comprises a nozzle support rake (101) and a hose (200), which are configured to provide power to the nozzle support rake (101), and the power transmission system (1) comprises: - a frame (2), - a rotatable electric pebble (3), - a back support pebble (4), - a rotating electric pebble (2), - a back support pebble (3), - a back support pebble (2), - a back support pebble (4), - a back support pebble (3), - a back, -Electric pebble drive (3), DaNS, wherein the power cobble (3) and the anti support cobble (4) are configured to drive the displacement of the pipe (200) by friction with the pipe (200), and the power transmission system (1) also includes ensuring the power cobble (3) and the anti support cobble (4) Reverse support (4)And configured to provide direct torque transmission from the electric roller (3) to the counter support roller (4).Abstract figure: Figure 6
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