The grate has ridges and {HEAD ~ valleys} to distribute {TAIL ~ heat} evenly and to radiate heat to the food from several directions 
to distribute
The grate has ridges and { HEAD ~ valleys } to distribute { TAIL ~ heat } evenly and to radiate heat to the food from several directions
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH