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