If {HEAD ~ the height} of the core partition is lower than the tip of the nozzle of the core burner, the core partition is not capable of exerting the effect to prevent {TAIL ~ the airflow} 
If { HEAD ~ the height } of the core partition is lower than the tip of the nozzle of the core burner , the core partition is not capable of exerting the effect to prevent { TAIL ~ the airflow }
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL