9 Electric and electronic control, switching and monitoring units for the regulation and operation of machines, namely, drive control units, digital and analogue interface modules, electrical operating units, power supply for industrial production, power converters, and frequency converters, the foregoing for servomotors, industrial robots and for resistance welding equipment as well as for industrial assembly tool; electric controls for resistance welding equipment; robot controls; systems comprising digital controls and drive units for the synchronized drivers of machine axes; electric and electronic control units for the automation of production machinery, namely, for assembly and handling machines, printing machines, machine tools, transfer lines, squeezers, cylinders, packaging machines, turning machines, milling machines, grinding machines, punching machines and laser culling machines; electronic systems for monitoring and controlling the movement and resistance of welding equipment comprised of drive control units, digital and analog interface modules, electrical operating units, power supplies for industrial production,power converters, frequency converters, electric controls for resistance welding equipment, robot controls; systems comprising digital controls and drive units for the synchronized drives of machine axes and electric and electronic control units for the automation of production machinery; systems comprising digital controls and drives for positioning axes in the field of automation technology consisting of control units comprised of hardware and software, electronic drive control units, digital and analogue interface modules, operating units, oil level sensors, timing sensors, measurement leads, signal leads and control leads; computer programs and software recorded on data carriers for the operation of the aforementioned equipment and systems, namely, for digital automation equipment, numerical controls and electric drives, electric and electronic control units