When located in the stretching zone, the thin patterns are arranged to cooperate with thick patterns so that the voltage well generated by {HEAD ~ the rotating field} of {TAIL ~ the device} has a substantially constant value while moving along the thick patterns 
When located in the stretching zone , the thin patterns are arranged to cooperate with thick patterns so that the voltage well generated by { HEAD ~ the rotating field } of { TAIL ~ the device } has a substantially constant value while moving along the thick patterns
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 REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH