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