hat
API C seri estime inite / croisement pompage inite w la / mache travès estime inite w la se yon sèl kalite konvansyon travès estime inite w la ki sélectionne manivelle metòd balans li.
eng
The API C series Pumping Units / beam pumping unit / walking beam pumping unit is one kind of convention beam pumping unit, which selects the crank balanced method.