{HEAD ~ The ends} of {TAIL ~ the nozzle parts} 13, 14 facing away from the contact member 5 have conical surfaces 20, 21 
of
{ HEAD ~ The ends } of { TAIL ~ the nozzle parts } 13 , 14 facing away from the contact member 5 have conical surfaces 20 , 21
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH