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