Embodiments of the invention provide a method and an apparatus for automatic verification of a zone configuration of a plurality of network switches. An oil pump housing is cast integrally with the inner side of the right side surface of the oil pan. The slot of a fin receives the tab of an adjacent fin. The device includes a receptacle for mixing the cosmetic composition including the compression wall and a side wall displaceable together with the compression wall. The process is characterized by reacting a fluorine-containing polymer which has an iodine atom or a bromine atom at either or both terminals of the backbone chain andor at a side-chain terminal with a radical-polymerizable monomer in the presence of a sulfur compound represented by general formula : nH2-nS2O4.