As will be discussed, {HEAD ~ these notches} may be employed to cooperate with pins or {TAIL ~ other retainers}, to prevent relative rotation between the casing 75 and the segments 
employed to cooperate with
As will be discussed , { HEAD ~ these notches } may be employed to cooperate with pins or { TAIL ~ other retainers } , to prevent relative rotation between the casing 75 and the segments
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH