{HEAD ~ The transformer} may function at any desired frequency, from very low frequencies through {TAIL ~ power frequencies} and audio frequencies to very high frequencies 
{ HEAD ~ The transformer } may function at any desired frequency , from very low frequencies through { TAIL ~ power frequencies } and audio frequencies to very high frequencies
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH