PLANTS FOR PRODUCING, MACHINING AND/OR ASSEMBLING COMPONENTS WHICH CONSIST OF METAL AND/OR PLASTIC, THE PLANTS BEING COMPRISED OF MECHANICAL APPLIANCES FOR SCREWING, JOINING, LASER WELDING, CAULKING, STUDDING, FRICTION WELDING, GLUING OR GROUTING, MECHANICAL DEVICES FOR LETTERING OR PRINTING OF THE MANUFACTURED, MACHINED OR ASSEMBLED COMPONENTS BY MEANS OF DOT MATRIX PRINTER, TAMPON PRINTING OR LASERS, MACHINES FOR CHIP-REMOVING MACHINING OF METAL AND/OR PLASTIC COMPONENTS, INJECTION MOLDING TOOLS, PUNCHING TOOLS, BURRING TOOLS FOR METAL AND/OR PLASTIC COMPONENTS, MEASURING INSTRUMENTS FOR CHECKING FORCES, MOMENTS, POSITIONS, ANGLES, PRESSURES, LEAKS, RADIO AND INFRARED SIGNALS, CURRENTS OR FIELD INTENSITIES ON THE SPECIMEN OR FUNCTIONS OF THE SPECIMEN, ELECTRICAL AND/OR ELECTRONIC EQUIPMENT FOR DATA TRANSMISSION BY MEANS OF INDUCED CURRENTS, BY MEANS OF RADIO OR INFRARED TELEGRAMS OR BY THE READING OF BARCODES, ELECTRICAL CONTROLS FOR EQUIPMENT FOR MANUFACTURE, MACHINING AND/OR ASSEMBLY OF COMPONENTS, NAMELY BY MEANS OF A STORED-PROGRAM CONTROLLER (SPC) OR BY MEANS OF AN INDUSTRIAL PC, LASER WELDING APPLIANCES, MOBILE DATA MEDIA, NAMELY TRANSPONDERS, READ AND/OR WRITE DEVICES FOR MOBILE DATA MEDIA, NAMELY FOR TRANSPONDERS