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