{HEAD ~ Handle} 7 merges into {TAIL ~ a neck} 11 and the pivotal stump 12 fits into a channel 34 of housing 8 
merges into
{ HEAD ~ Handle } 7 merges into { TAIL ~ a neck } 11 and the pivotal stump 12 fits into a channel 34 of housing 8
HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH