1953 September, “Restoring British Permanent Way to Prewar Standards”, in Railway Magazine, page 587:
The renewal of track by cranes and special tracklaying machines which lift out entire 60 ft. lengths of old track and lay in pre-assembled 60 ft. lengths of new, allows the process of renewal to proceed at a considerably faster rate than possible by older methods.
(fencing) An offensive action made immediately after a parried one.