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