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Puyang Refractories Group Co.,Ltd (Hereinafter called PRCO Ltd) is the largest refractories supplier in China domestic steel industry, whose leading product, secondary refining Purging Plug, takes over the largest domestic market share. PRCO Group has 25 subsidaries at present, with 16 for iron & steel making, 3 for refractory raw materials production, 2 specially for environment friendly refractories production, and 4 share-hoilding companies. PRCO Qinghai High-tech Materials Co., Ltd. is one of the 3 refractory raw materials materials companies, currently producing high purity dead burned magnesia, high purity caustic calcined magnesia, low iron and high calcium fused magnesia, large crystal fused magnesia, PN-MH series high purity caustic calcined magn…