Terms for subject Librarianship containing folding

English	Chinese
black folding line	黑口
characters on folding line	口
characters on folding line	花
double folding spots	双鱼尾
folding of sheets	折页
folding spot	鱼尾
four-fold bibliographical classification system	四库分类法
four-fold bibliographical classification system	四部分类法
gate-fold	大张褶页插图