Binding printed matter by piercing the pages and securing them together with wire or thread

Two or more folds parallel to each other with adjacent folds in opposite directions

In saddle stitching, the thickness of the bound should not exceed

The operation of putting lines on blank or preprinted sheets

'Squareness' of trimmed paper is obtained by utilizing the ------------- component of the cutting machine.

Breaking of the fibers in paper or board to facilitate folding or bending