9 Scientific apparatus and instruments, namely, laboratory optical apparatus in the nature of optical sensors, optical mirrors; nautical apparatus and instruments, namely, luminous safety beacons, underwater power cables; surveying apparatus and instruments; electric apparatus and instruments, namely, electric switches, electric batteries, electric power supplies; photographic apparatus and instruments, namely, flashlights, darkroom lamps, reflectors for photographing; cinematographic apparatus and instruments; optical apparatus and instruments, namely, optical reflectors, optical lanterns; weighing apparatus and instruments; measuring apparatus and instruments, namely, bevels, angle finders, and distance measuring apparatus; signaling apparatus and instruments, namely, luminous traffic signals, lamps for use as warning beacons; checking apparatus and instruments, namely, phase checkers in the nature of phase indicators, testing apparatus for checking the battery level of electronic devices; life-saving rescue apparatus and instruments, namely, vehicle breakdown warning lamps; apparatus and instruments for electrical engineering, namely, apparatus and instruments for conducting, transforming, storing, regulating and controlling the distribution or use of electric current; electricity transformers; rechargeable batteries; batteries, electric; solar batteries; battery chargers; solar panels for production of electricity; electrochemical cells, namely, galvanic cells and batteries; battery testers; accumulators, electric; chargers for electric batteries; electrotechnical and electric apparatus and instruments, namely, power supply equipment in the nature of power supplies; electronic devices for monitoring voltage and electrical current; emergency shut-off devices in the nature of electric switches, and safety equipment in the nature of beacon lights; regulators, namely, electric light dimmers; lighting control apparatus; voltmeters; change and quick-change systems for batteries comprised of batteries and battery chargers