{HEAD ~ an arm} carrying said {TAIL ~ dip ring} at a first point and mounted for movement about a first axis passing through said arm at a second point 
{ HEAD ~ an arm } carrying said { TAIL ~ dip ring } at a first point and mounted for movement about a first axis passing through said arm at a second point
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH 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