Three-knife trimmer A guillotine designed with three knives for trimming sizeable stacks of books or magazines. One trim removes the feet and heads and another the foredge.

• 三刀切书机设计用来裁切适量书本或杂志边缘的切纸机。先用两刀,同时裁去头脚书边;再加一刀,裁去切口书边。