The eccentric ring and shaft are encapsulated by the ball, {HEAD ~ the ball material} passing through and around the eccentric ring and {TAIL ~ shaft} 
passing around
The eccentric ring and shaft are encapsulated by the ball , { HEAD ~ the ball material } passing through and around the eccentric ring and { TAIL ~ shaft }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL