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Haicheng city gold magnesium oxide manufacturing limited company is located in Ya Hai city decorated archway town home villiage. plant distance 15 kilometers sea city highway and railway is very corwenient, The factory has six reflection Raymond unit and open pit mining roadway mining two ore of high purity caloium silicon.fewer impurities Hantie.with an annual output of twenty thousand tons of high quality light burned magnesium.