Further {HEAD ~ the chamber} 150 also includes a second wall portion that is disposed along a direction that is at {TAIL ~ an angle} between ten degrees and eighty degrees with respect to channel wall 145 
Further { HEAD ~ the chamber } 150 also includes a second wall portion that is disposed along a direction that is at { TAIL ~ an angle } between ten degrees and eighty degrees with respect to channel wall 145
OTH HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH