| 摘要 |
The disclosed powertrain can comprise a pulley and a belt. The pulley and the belt are provided to have a structure in which an outer circumferential surface of the pulley and a bottom surface of the belt come in contact with each other without coming into contact with a side surface of the pulley and the belt when coupling the pulley and the belt. The outer circumferential surface of the pulley has a V-shaped structure with no protruding portions on both sides thereof, and the bottom surface of the belt can come in contact with the outer circumferential surface of the pulley. |
