The dual-clutch gearbox is a type of semi-automatic gearbox. Like the manual gearbox, it consists of a multi-gear set, except that it uses two clutches to disconnect and connect the force for the couple or individual gears, and the couple and individual gears are placed on two independent rods, and in fact, this system is like two separate manual gearboxes with sequential clutches, which are placed in a chamber and perform as a unit.