CAM-based search engines may be configured to support multiple databases within a CAM core. In a described implementation, an internet service event, which occurs at least partially within an internet environment, is detected. Each frame unit includes a continuous track, enabling forward movement of the serpentine robotic crawler. The head set includes a head piece. Re-lining induction coil heating devices with non-hazardous materials of the invention uses a multiple step process of removing existing hazardous installation materials and replacing with multiple layers of environmental and user safe glass cloth material treated with suspended refractory material in a carrier solution.