French link stitch
OAB Definition
along the spine sewing which may use support tapes. The thread that is external to the signatures drops down and links under the thread of the previous section before entering the original section, making a crisscross pattern. Used in both exposed sewing bindings and bindings with covered spines.
ABT Definition
Bindings using an all-along sewing pattern, in which stitches alternate between two sections, and long outside stitches link through the stitch from the previous gathering.