9 Scientific, optical, measuring, signalling, checking (supervision) and life-saving apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; data processing equipment; computers; computer software; software for controlling, regulating, managing and documenting welding processes; current rectifiers; converters, electric; commutators; welding transformers; welding rectifiers; welding converters; welding inverters; apparatus for controlling; electrical and electronic controllers for welding equipment and welding machines; material testing instruments and material testing machines; testing apparatus for weld seams; endoscopes, not for medical purposes; ultrasound apparatus, not for medical purposes; electronic controller for robots; apparatus and attachment and equipment components for connecting technical welding systems to robots and automation equipment, namely, welding process control equipment, electric and electronic connection equipment for connecting welding installations to industrial robots (interface equipment and modules), energy supply equipment and power sources for welding processes, electronically controlled wire advancing equipment and components; sensors and apparatus for monitoring additional welding filler materials (electrode wires/welding rods, gases and liquids), in particular wire feed devices, wire advancing equipment and wire adjustment devices, and wire accumulation units, provided with sensor technology