{HEAD ~ The other end} of {TAIL ~ upper arm} 18 is connected to one part 20a of a head joint 20 while the other part 20b of the head joint 20 is connected to a light element 22 
of
{ HEAD ~ The other end } of { TAIL ~ upper arm } 18 is connected to one part 20a of a head joint 20 while the other part 20b of the head joint 20 is connected to a light element 22
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH