1, according to the volume, volume directory, file and reference table, put them in order, and punch them with a punch;

2. After the hole file is punched, in order to install it, it is clamped with a dovetail clamp, which is not easy to disperse, and it will be easier to thread and bind;

3. Thread the binding needle with cotton thread, just a single thread, and pass through the holes in the back and middle;

4. After wearing the front, you can wear the upper face or the lower face, both of which can be selected according to personal habits;

5. After penetrating the back of the case file, another back lead leads from the middle hole to the front, and another lead leads from another hole to the back;

6, knot, cut off the excess thread, you can complete the binding.