In the embodiments of the invention, the outlet device 9 may have the form of an end diffusor of {HEAD ~ the suction device} 6 by means of which the extracted air and {TAIL ~ the received driving medium} is discharged, with this end diffusor being realized with a view to thereby reducing the exit losses 
In the embodiments of the invention , the outlet device 9 may have the form of an end diffusor of { HEAD ~ the suction device } 6 by means of which the extracted air and { TAIL ~ the received driving medium } is discharged , with this end diffusor being realized with a view to thereby reducing the exit losses
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