Abstract: A system to exterminate and control subterranean termites and other subterranean pests inhabiting a subterranean area surrounding or in close proximity to a structure having a perimeter near ground level and support pads includes a plurality of first pipes, a plurality of second pipes, a source of steam, a plurality of temperature sensors, a temperature display and a controller. Each pipe has a plurality of holes in its sidewall. The first and second pipes are disposed beneath ground level along the perimeter of the structure and along its support pads, respectively. The source of steam is fluidly coupled to the pipes. Each temperature sensor is disposed adjacent to one of the pipes. The temperature sensors generate temperature signals. The temperature display displays a temperature reading of the temperature adjacent to each pipe in response to the temperature signals. The controller regulates pressure and/or temperature of the source of steam in response to the temperature signals.

Abstract: An improved stereolithographic system which produces a three-dimensional object from a heat curable fluid medium which is capable of solidification when subjected to heat includes a computer-aided design controller, a container, an elevator platform and a first servo mechanism which incrementally drives the elevator platform in response to the output signals. The improved stereolithographic system also includes an elongated carrier which is movably coupled to the container, a second servo mechanism which incrementally drives the elongated carrier along the two side walls of the container in response to the output signals, a plurality of spot-sources of heat and a switching network. Each spot-source of heat may be individually switched on and is serially disposed on and fixedly coupled to the bottom surface of the elongated carrier on the bottom surface adjacent to the designated working surface. The switching network individually switches on each spot-source of heat in response to each set of output signals.