{HEAD ~ The measured time} represents {TAIL ~ the relative position} of the transducers along the magnetostrictive element 
represents
{ HEAD ~ The measured time } represents { TAIL ~ the relative position } of the transducers along the magnetostrictive element
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH