A nitride semiconductor laser device using a group III nitride semiconductor also as a substrate offers excellent operation characteristics and a long laser oscillation life. Upon acquiring the node identifier, the application layer transmits the node identifier to the VIP layer through the TCPUDP layer. The inner ring is formed annularly on the mounting side of the annular drum hoop and is formed with the mounting segment. A holding plate is positioned between the opposed surfaces of those assembled units, and is provided both with through-holes for attaching the hydraulic unit to the motor unit, as well as with through-holes for attaching the assembly to the vehicle structure of the particular vehicle application. A typical embodiment is 3,3-bis-acrylonitrile.