before processing {HEAD ~ the plate workpiece} in {TAIL ~ the region} of the formed shape, securing the selected tool punch to the tool punch holder, and securing the selected tool die to the tool die holder 
before processing { HEAD ~ the plate workpiece } in { TAIL ~ the region } of the formed shape , securing the selected tool punch to the tool punch holder , and securing the selected tool die to the tool die holder
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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