HIGH-FREQUENCY SWITCHING POWER SUPPLIES, AUTOTRANSFORMERS, TRANSFORMERS, INVERTERS, ELECTRIC CONTROL PANELS, ELECTRICAL CONTROLLING DEVICES, ELECTRIC CURRENT CONVERTERS, ELECTRIC CURRENT CONTROL DEVICES, NAMELY, CURRENT RECTIFIERS, CURRENT CONVERTERS, ELECTRICITY CURRENT LIMITERS, VOLTAGE STABILIZING POWER SUPPLY, VOLTAGE STABILIZERS, VOLTAGE REGULATORS, POWER SWITCHES, CHARGERS FOR ELECTRIC BATTERIES, CURRENT RECTIFIERS, RECTIFIER MODULES, COMMUTATORS, POWER TRANSFORMERS FOR AMPLIFICATION, R...