Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking, supervision, life-saving and teaching apparatus and instruments, namely, limit indicators, radar apparatus, ultrasound inspection devices for non-medical, non-destructive testing, pressure sensors, thermometers, electronic detectors for observing and measuring the infrared spectrum, namely, infrared detectors; scientific measuring instruments for the online and inline ascertainme...