API B Series Pumping Units,Pumping Units.. API B series Pumping Units is conventional walking beam pumping units, its a common type of power equipment ... .The products conform to API Spec.11E Specification for Pumping Units and other relative API standards, acquired the authorization to use ... ,700362725,00015B-16D-53-305,300302316,000API B Series Pumping Units,Pumping Units.. API B Series Pumping ...