{HEAD ~ The coupling portion} and the main cylindrical member have {TAIL ~ a pair} of holes formed to correspond to each other, one of the pair of holes having a tapered surface inclined with respect to the axial direction 
have
{ HEAD ~ The coupling portion } and the main cylindrical member have { TAIL ~ a pair } of holes formed to correspond to each other , one of the pair of holes having a tapered surface inclined with respect to the axial direction
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH