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