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