In this position, an intense pressure drop prevails in the compressor inlet duct 19 between {TAIL ~ the region} upstream of the guide grating 21 and {HEAD ~ the region} downstream of the blades 20 of the auxiliary rotor wheel 10 
In this position , an intense pressure drop prevails in the compressor inlet duct 19 between { TAIL ~ the region } upstream of the guide grating 21 and { HEAD ~ the region } downstream of the blades 20 of the auxiliary rotor wheel 10
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH