ELECTRICAL APPARATUS, MACHINES, AND SUPPLIES-NAMELY, ELECTRICAL DISTRIBUTION AND CONTROL MACHINERY AND IMPLEMENTS-NAMELY, RECTIFIERS, TRANSFORMERS, INDUCTION VOLTAGE REGULATORS, SWITCHBOARDS, RELAYS, SWITCHES, RESISTORS, CIRCUIT BREAKERS, STATIC CONDENSORS, INDUCTIVE REACTORS, FUSES AND CONNECTORS; ELECTRIC BATTERIES-NAMELY, DRY CELLS, WET CELLS, AND STORAGE BATTERIES; ELECTRIC MATERIALS-NAMELY, INSULATORS, ELECTRODES, ARMATURE BRUSHES AND MAGNETIC CORES; ELECTRON TUBES-NAMELY, BRAUN TUBES, RECTIFIER TUBES, DISCHARGE TUBES, X-RAY TUBES AND PHOTO TUBES; AND SEMICONDUCTOR DEVICES-NAMELY, DIODES, TRANSISTORS AND THERMISTORS