Since {HEAD ~ the collar} is made of a resin, the rigidity thereof is lower than that of a metallic sleeve, and {TAIL ~ the coefficient} of linear expansion can be close to that of the sleeve so that the sleeve can be assembled and maintained with substantially no change in the bore precision thereof 
Since { HEAD ~ the collar } is made of a resin , the rigidity thereof is lower than that of a metallic sleeve , and { TAIL ~ the coefficient } of linear expansion can be close to that of the sleeve so that the sleeve can be assembled and maintained with substantially no change in the bore precision thereof
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH