{HEAD ~ The method} 23 wherein both the cooling water and the oxidant are injected through the side port into the reaction chamber in {TAIL ~ a direction} from the back portion to the front portion 
{ HEAD ~ The method } 23 wherein both the cooling water and the oxidant are injected through the side port into the reaction chamber in { TAIL ~ a direction } from the back portion to the front portion
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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH