A first cylindrical part in which axial part passages for supplying a fluid to or discharging a fluid from a fluid pressure chamber are formed is provided in a rotor and, at the same time, a second cylindrical member in which cover passages communicating with axial part passages and a fluid supplying and discharging means are formed is provided. System connected through public network or internal network. The socket connects an add-on expansion memory. The oil cooler is arranged upstream of the lubricating unit and the relief valve, and cools the hydraulic oil flowing to the lubricating unit and the relief valve. In some embodiments, the implant pattern includes heavily doped horizontal stripes with lighter doped regions between the stripes.