High-frequency switching power supplies; Inverters for power supply; Power switches; High-voltage power supplies; Power adapters; DC/AC power converters; Electronic power supplies for driving electric motors; Low-voltage power supplies; Voltage stabilizing power supply; Electrical power connectors; AC/DC power supplies; Uninterruptible electrical power supplies; Electronic signaling mechanism, namely, a train control system used in the railway industry for detecting and controlling trains, gr...