wherein the imbedded electrode is formed in the shape of a curvilinear winding or in {HEAD ~ the shape} of {TAIL ~ a curvilinear} winding with reversals in direction, 
wherein the imbedded electrode is formed in the shape of a curvilinear winding or in { HEAD ~ the shape } of { TAIL ~ a curvilinear } winding with reversals in direction ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH