{HEAD ~ The spline connection} permits {TAIL ~ the flange} to move axially while maintaining the drive coupling 
{ HEAD ~ The spline connection } permits { TAIL ~ the flange } to move axially while maintaining the drive coupling
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH