Why hospital oxygen can be nebulized

Hello. Hospital nebulizer inhaler is achieved through the oxygen pipeline, because the oxygen pipeline in the hospital can give high pressure, the oxygen flow rate of the general patient's oxygen inhalation is 3 liters/minute, while the nebulization can reach 6-8 liters/minute, and the medication is nebulized under the high pressure to form small particles into the patient's respiratory tract to achieve the therapeutic effect. And the general oxygen cylinder is impossible to do.