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