A computer-based three-dimensional image reconstruction method and system are presented. The invention is further constituted by a blade for a cutter head. The method further includes detecting contact with the camera or the field of view of the camera on the touch-sensitive display, and manipulating the camera based on a gesture conducted on the camera or the field of view of the camera shown on the touch-sensitive display. The isolative layer is originally in a liquid state or in a temporarily solid state and later permanently solidified. A primary bridge according to the present invention is coupled to the first PCI bus. The communications between the client systems and the server systems over the communication network can occur without having to care about the communication paths along which the communications travel and as if the first license manager in the client systems and the second license manager in the server systems reside on the same LAN.