The STE brand industrial plug is mainly used in: steel smeltering, petrochemical industrial, electric power, electron, railroad, building ground, air port, stope, water supply and sewerage work, port and jetty, marketplace, hotel and so on. It can be used stably in indoor and outdoor working environment of higher & lower temperature. The product is compatibly matched with the same model components of other manufacturers in the world. It is new plugging device and completely replace the plug and socket of electric motor.