The containers may be hinged together on one side to form {HEAD ~ sample cases} and detachably connected to {TAIL ~ the dolly} 
The containers may be hinged together on one side to form { HEAD ~ sample cases } and detachably connected to { TAIL ~ the dolly }
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