Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, and inspecting, life-saving and teaching apparatus and instruments in the nature of thermohygrometers; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; thermometers, namely, infrared thermometers not for medical purposes; measuring apparatus, namel...