{HEAD ~ A gripping element} 91 is supported by {TAIL ~ the underside} 74b of gear 74 
is supported by
{ HEAD ~ A gripping element } 91 is supported by { TAIL ~ the underside } 74b of gear 74
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH