The nozzle is formed of and defined by two moveable nozzle parts, the relative position of which determines {TAIL ~ the size} of {HEAD ~ a discharge cross section} in the nozzle 
The nozzle is formed of and defined by two moveable nozzle parts , the relative position of which determines { TAIL ~ the size } of { HEAD ~ a discharge cross section } in the nozzle
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH