Thus cementite is always tending to change over into graphite by the reaction Fe C = 3Fe +Gr, though this tendency is often held in check by different causes; but graphite never changes back directly into cementite, at least according to our present theory.
She'd become so accustomed to the British Roadster, and now had to change over to a VW Golf convertible.
To maintain continuity over this change over period there will be a limited update in October 2003.
A key on the control position operated the cubicle change-over relays.
We have a tremendously exciting program of change over the next few years as we redevelop the museum.