[ Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking, supervision, lifesaving, and teaching apparatus and instruments, namely, flow meters, underwater sonar measuring devices, level measuring machines, audio and visual devices, namely, audiometers, audio-video receivers, and audio and visual recordings featuring machinery noises, acoustic meters, multimedia projectors, optical inspection apparatus, audible alarm signals, electroni...

Process equipment, namely ultrasound reactor units for use in municipal and industrial sludge treatment