The shaped bar is removed from the chamber bottom end, upon opening the bottom wall, by shifting it to an opened position laterally offset from {HEAD ~ the open bottom end} of {TAIL ~ the chamber} 
The shaped bar is removed from the chamber bottom end , upon opening the bottom wall , by shifting it to an opened position laterally offset from { HEAD ~ the open bottom end } of { TAIL ~ the chamber }
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL