The wheeled sample display unit shown in the drawings has three sample cases stacked in a vertical arrangement and held together by latches 15 on the front of {HEAD ~ the cases} and latches 15 on {TAIL ~ the rear} of the cases 
The wheeled sample display unit shown in the drawings has three sample cases stacked in a vertical arrangement and held together by latches 15 on the front of { HEAD ~ the cases } and latches 15 on { TAIL ~ the rear } of the cases
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 OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH