The sleeve extension 151 has a free end 155 located in {HEAD ~ the region} of {TAIL ~ the outlet} apertures 152 
of
The sleeve extension 151 has a free end 155 located in { HEAD ~ the region } of { TAIL ~ the outlet } apertures 152
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH