a plurality of level control lines for sequent realization of said level combinations by actuating said coils, in {HEAD ~ accordance} with {TAIL ~ sequence} of actuated power levels 
with
a plurality of level control lines for sequent realization of said level combinations by actuating said coils , in { HEAD ~ accordance } with { TAIL ~ sequence } of actuated power levels
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH