The inner periphery of each intermediate ring is formed with {HEAD ~ an axis} eccentric with {TAIL ~ respect} to the axis of the casing 
eccentric with
The inner periphery of each intermediate ring is formed with { HEAD ~ an axis } eccentric with { TAIL ~ respect } to the axis of the casing
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH