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