{HEAD ~ The substrate} may further include {TAIL ~ an excitation electrode} for exciting the surface acoustic wave 
include
{ HEAD ~ The substrate } may further include { TAIL ~ an excitation electrode } for exciting the surface acoustic wave
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH