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