the number of shafts provided in heavy duty vehicles gear box is normally
Transmission (mechanics) Many transmissions and gears used in automotive and truck applications are contained in a cast iron case, though more frequently aluminium is used for lower weight especially in cars. There are usually three shafts: a mainshaft, a countershaft, and an idler shaft.
Box plot The unusual percentiles 2%, 9%, 91%, 98% are sometimes used for whisker cross-hatches and whisker ends to show the seven-number summary. If the data is normally distributed, the locations of the seven marks on the box plot will be equally spaced.