{HEAD ~ The plate} has {TAIL ~ a viewing hole} juxtaposed in visual alignment with the burner for visual confirmation of flame ignition 
has
{ HEAD ~ The plate } has { TAIL ~ a viewing hole } juxtaposed in visual alignment with the burner for visual confirmation of flame ignition
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH