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Stopper the middle of the whole tank is mainly used for opening and closing, control head stopper to the position of the middle tank outlet into the crystal device to regulate the flow of molten steel, but also through the center hole of the overall Stopper tank to the center SEN argon, To prevent nozzle clogging. Stopper for the combination of the traditional type, the sleeve plugs brick tiles and assembled in series with the pipe. Because of its joints and more liquid steel, slag easily immersed into the cracks caused by broken connecting rod or plug head off, the accident rate.
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