FIG 5 illustrates the magnetic lines of {TAIL ~ force} on a device constructed according to principles of {HEAD ~ the invention} 
FIG 5 illustrates the magnetic lines of { TAIL ~ force } on a device constructed according to principles of { HEAD ~ the invention }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD