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