A message is {TAIL ~ output} when the degree of {HEAD ~ the wear position deviates} from the degree of the reference position by more than the degree of wear permissible 
A message is { TAIL ~ output } when the degree of { HEAD ~ the wear position deviates } from the degree of the reference position by more than the degree of wear permissible
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH