Installation, repair, and maintenance of computer hardware, mass flow meters, which measure the mass flow of gases, liquids and vapors, mass flow controllers, which control the mass flow of gases, liquids and vapors, mass flow calibrators, which calibrate the mass flow of gases, liquids and vapors, electric pressure transmitters, electronic pressure controllers, control valves, volumetric flow meters in the nature of magnetic-inductive flow meters, turbine flow meters, positive displacement f...

Scientific measuring instruments, namely conductivity meters; surveying machines and instruments; photographic apparatus, namely cameras; cinematographic machines and apparatus; electronic and optical communications instruments and components, namely, digital transmitters; apparatus for recording, transmission or reproduction of sound or images; blank magnetic data carriers, blank recording discs; cash registers, calculating machines, namely calculators, data processing equipment in the natur...