1. API Spec 11E pumping unit 2.Conventional beam pumping unit 3. simple, stable, convenient, long service life pumping unit Modularization and virtual manufacturing technology ... and crank pin bearing, reducing installationerrors and the vibration when pumping unit is operating.Hanging structure of the horsehead is “self ... , 2357,000C-57D-76-427,60042, 33, 2357,000 Beam Pumping Unit