Sawn-in sewing: Style of sewing where cuts are sawn into the spines of the sections to take the cords which are sewn with the sections.Also called Sunk cord sewing.

• 锯坑线订:线订装的一种款式。用锯在书帖的脊背上锯浅坑，铺上粗绳，然后用线缝接。亦称藏绳锁线订。