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METHOD AND DEVICE FOR DESULPHATING AN EXHAUST-GAS PURIFICATION DEVICE ARRANGED IN AN EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR OF A DIESEL INTERNAL COMBUSTION ENGINE
METHOD AND DEVICE FOR DESULPHATING AN EXHAUST-GAS PURIFICATION DEVICE ARRANGED IN AN EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR OF A DIESEL INTERNAL COMBUSTION ENGINE