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