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