A printed material to be folded a plurality of times is paginated by displaying an unfolded leaf and assigning page numbers to pages on the face and back of the unfolded leaf through computer processing. Further the invention relates to processes for producing salts and for producing pharmaceutical compositions compounds comprising at least one such oxetanone derivative or salt, as well as methods for using such compounds and compositions for inhibiting lipases. A yoke made of a magnetic body is disposed between the movable terminal and the first end of the movable shaft. A plurality of protrusions is formed by the intersection of the first channels and the second channels. Any backflow can be guided out of the frame via the air passage and the pressure relief section without interfering with the inflow of air, allowing the ring-type fan to have upgraded heat dissipation performance. The invention also relates to a flooring material obtained by the method.