Scientific, nautical, surveying, photographic, optical, weighing, measuring, signaling, checking, and teaching apparatus and instruments, namely, spectrometers, underwater enclosures for cameras, tripods, cameras, optical cables, scales, measuring tapes, optical signaling cables, and medical teaching mannequins; apparatus and instruments for conducting, switching, transforming, storing, regulating, and controlling electricity, namely, electrical conductors, electrical switches, electrical tra...