F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
F04B47/08—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth the motors being actuated by fluid
Soupape d'injection de gaz pour l'injection de carburant sous forme gazeuse, notamment d'hydrogène, dans la chambre de combustion d'un moteur à combustion interne .