Installation, repair and maintenance of water filters, water purification devices, water sterilizers, water treatment devices, and limescale protection systems; assembly relating to the installation of water filters, water purification devices, water sterilizers, water treatment devices, and limescale protection systems

Data carriers for computers having software recorded thereon for use in ultrasonic testing and inspection of materials; recorded computer software for use in ultrasonic testing of materials; electrical test apparatus, namely, electronic ultrasonic test equipment in the nature of ultrasonic flaw detectors, thickness testers and hardness testers, for non-medical use; scientific testing and quality control devices, namely, sensing and signaling devices for measurement and quality control of mate...