Manufacture of primary cells and primary batteries nd rechargable batteries, cells containing manganese oxide, mercuric oxide silver oxide or other material
Manufacture of electric power distribution transformers, arc-welding transformers, fluorescent ballasts, transmission and distribution voltage regulators
Manufacture of fire extinguishers and other equipment for projecting, dispersing or spraying liquids or powders whether or not hand-operated, including sand blasting machines, stream cleaning machines etc.