A nitride-type compound semiconductor laser device includes a substrate and a layered structure provided on the substrate. A cylindrical wire harness leading-out guide is provided on the periphery of the wire harness leading-out opening, and is formed in a way that the both circumferential ends of a half-cylindrical body formed on the electric connection box and a half-cylindrical body formed on the bottom surface cover are coupled to each other. The second domain managing entity manages a second domain. In this manner, a user need not perform manual isolation of FCoE-carrying trunks in a data center environment. In some cases it even causes particulate flow, as in cold heavy oil production with sand. A content of the metallic impurities in the feedstock is lower than 10 ppm.