{TAIL ~ These means} consist of two electrical contacts, one fixed and the other mobile , between which pass the coins introduced, these contacts forming part of {HEAD ~ a detection circuit}  
{ TAIL ~ These means } consist of two electrical contacts , one fixed and the other mobile , between which pass the coins introduced , these contacts forming part of { HEAD ~ a detection circuit }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH