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