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Publication of AT526741A2publicationCriticalpatent/AT526741A2/en
Publication of AT526741A3publicationCriticalpatent/AT526741A3/en
Double walled steel stack for producing electrical energy from exhaust gas heat, has spiral shaped cooling pipe and heat exchanger with primary thermoelectric modules in lower area, where primary cooling medium is guided through pipe
Process for the production of cables with oil or mass-saturated cable cores, in which the cable core is drawn into an elongated metal tube made of a metal with a higher melting point than lead
Semiconductor lighting device i.e. LED lighting device, for e.g. use as ceiling spotlight in ceiling mounting, has hollow reflector comprising air passage aperture between outer side and inner side i.e. reflecting surfaces, of reflector