{HEAD ~ The buffer element} is disposed on the lateral wall with its lateral side facing the lateral wall of {TAIL ~ the supporting base} 
{ HEAD ~ The buffer element } is disposed on the lateral wall with its lateral side facing the lateral wall of { TAIL ~ the supporting base }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL