{HEAD ~ The ends} of {TAIL ~ the nozzle parts} 13, 14 facing the contact member 5 are guided in the groove 12 
of
{ HEAD ~ The ends } of { TAIL ~ the nozzle parts } 13 , 14 facing the contact member 5 are guided in the groove 12
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