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