The object of the invention is to provide a solar panel and a method for manufacturing the same, wherein the manufacture of the solar panel for use in space and repair work thereon can be performed easily and in little time. The temperature-control element has a temperature-control channel in an interior of the temperature-control element. for low amplitudes, is reduced more or less linearly with the amplitude of the signal to be amplified. Each hinge piece has a base portion for allowing securement of the hinge piece to the walled enclosure and an integral portion spaced from the base portion for journalling a respective end of the shaft structure for rotation about its axis whereby allowing the bar lock mechanism to move relative to the walled enclosure. When the robot is used as an automatic vacuum cleaner, an air flow is forced into the robot arm and the -cleaning effect can further be enhanced by providing one or more Circular rotary brushes at the front end of the arm. The complete integration of the Internet transmission function into ATM communications systems results in effective traffic and network management of ATM cells related to Internet data packets with a very low level of integration complexity.