In this sort of gearbox, the many gears of the principle shaft are in regular mesh With all the corresponding gears with the countershaft (layshaft). Since the figure shows, two sliding Pet clutches are offered on the key shaft. It's an epicyclic gear arrangement. Since the determine shows the front view https://griffinciiif.blogproducer.com/41192140/rumored-buzz-on-automobile-gearbox