Side window retention means firmly but flexibly grasp the edge portions of each side window and thereby utilize the windows as {HEAD ~ structural members} to add {TAIL ~ strength} to the showcase 
to add
Side window retention means firmly but flexibly grasp the edge portions of each side window and thereby utilize the windows as { HEAD ~ structural members } to add { TAIL ~ strength } to the showcase
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 REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH