{HEAD ~ An inner cylindrical member} 40 containing the rear cylindrical members 4 is slidably disposed within {TAIL ~ the main cylindrical member} 1 
is slidably disposed within
{ HEAD ~ An inner cylindrical member } 40 containing the rear cylindrical members 4 is slidably disposed within { TAIL ~ the main cylindrical member } 1
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH