A cyclic carbodiimide compound which is useful as an end-sealing agent for polymer compounds. The system includes a central computer, a client computer, a communications link between the central computer and the Internet, and a communications link between the client computer and the Internet. The units communicate with other nearby units within communication range, to establish neighbor lists. Through the transfer section and the like, the primary wet film is guided to a first drying chamber where a wet gas containing water vapor is blown onto the primary wet film. The wiper is applied, with a predetermined amount of pressure, to a residue-bearing surface, and the surface is wiped, while applying the predetermined amount of pressure, to remove residue from the surface, such that the surface has less than 1 gm2 of residue after being wiped under the predetermined amount of pressure.