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Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 DEF

The machine that imparts the reciprocating motion to a string of sucker rods extending to the positive-displacement pump at the bottom of a well ...  2, fiche 1, Anglais, - pumping%20unit

Record number: 1, Textual support number: 1 CONT

Pumping unit. Relatively few oil wells flow from natural pressures. Most require secondary means of removing the reservoir product. The most common of several methods is the pumping unit. A walking beam is operated like a seesaw, raising and lowering a plunger-type pump set near the bottom of the hole.  3, fiche 1, Anglais, - pumping%20unit

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 OBS

(pour un seul puits).  2, fiche 1, Français, - unit%C3%A9%20de%20pompage

Fiche 1,  Justifications,  Espagnol