Bone matrix compositions having nanoscale textured surfaces and methods for their production are provided. The circuit board has a first outer face and a second outer face. When an already-registered member ID and password are inputted to web server for mobile telephones, web server for mobile telephones extracts identification information specific to the mobile telephone and records it linked to the already-registered member ID and password. The fixed compression joint of two of these metallic components of the fuel injector is characterized in that at least one of the components has a surface-roughening structure in its compression area, it being possible to create the surface-roughening structure using a laser and metal oxides being deposited on the structure.