T2T2T2T35T2T3T4T2T2TingHOOOLetsgoTRTR0.2DRST180.20.4TR201T22TR0.31.10.40.5TRW120.3T18ERS0.35ERS10.2T1T20.5T2F2T16T17T180.40.8T2T20.3T2T2T3T18ERSERSERST2F2F2201.20.20.20.72undercut119107PS.Q1（）