This cannot be permitted since it is necessary to apply a voltage of {HEAD ~ opposite polarity} to {TAIL ~ the transformer T1} to achieve demagnetization 
This can not be permitted since it is necessary to apply a voltage of { HEAD ~ opposite polarity } to { TAIL ~ the transformer T1 } to achieve demagnetization
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH