It should be noted that elements having a corresponding function have been provided with {HEAD ~ the same reference signs} in {TAIL ~ the different embodiments} 
It should be noted that elements having a corresponding function have been provided with { HEAD ~ the same reference signs } in { TAIL ~ the different embodiments }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL