Batteries; bells (warning devices); signal bells; plumb bobs; plumb lines; welding electrodes; electrical wires; soldering apparatus, electric; electric soldering irons; fuse wire; wires, electric; tape measures; micrometers; surveyors' levels; workmen's protective face-shields; protective helmets; protective masks; filters for respiratory masks; respiratory masks other than for artificial respiration; protective masks for soldering; rules (measuring instruments); measures; spectacles; safety...