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 ... bearings are adopted in equalizer beam bearing and crank pin bearing, reducing installationerrors and the vibration when pumping unit is operating.Hanging ... , 33, 2357,000C-57D-76-427,60042, 33, 2357,000 API Beam Pumping Unit