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