Pyrometers; temperature indicators; acoustic couplers; electric measuring devices, namely, clamp meters for measuring electricity; electrical inductors; indicators, namely, electronic indicator boards, electronic indicator panels; surveying apparatus and instruments, namely, surveying machines and instruments; gasometers; thermostats; electrical wires; photovoltaic cells; lens hoods; quantity indicators, namely, measuring couplings for measuring quantity of fluids in hydraulic or pneumatic sy...