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