The planetary reducer of the 3300hp triplex plunger pump is the world’s first gearbox of the 3300-type fracturing pump truck researched and developed by the company. The company began to research and develop the first-generation product JBX232 in 2009. After three upgradations in 2012, 2014 and 2016, it has now been the fourth-generation product JBX232D, which has been widely praised by users.