A.An operation of cutting extra wide threads
B.An operation of cutting a groove next to a shoulder on a piece of work
C.Cutting from the base of a work piece
D.An operation of cutting deep grooves
E.None of above
A.An operation of cutting extra wide threads
B.An operation of cutting a groove next to a shoulder on a piece of work
C.Cutting from the base of a work piece
D.An operation of cutting deep grooves
E.None of above