Batteries, namely electric batteries, galvanic batteries, solar batteries, bells (warning apparatus), signal bells, electric door bells, plumb bobs, plumb lines, welding electrodes, electricity conduits, electric welding apparatus, electric soldering irons, fuse wires, measuring instruments, surveying chains, micrometers, surveyors' levels, levels (instruments for determining the horizontal), protective helmets, protective masks, filters for respiratory masks, respirators (other than for arti...