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The products have been used by many super-large domestic coal group users, for example China Shenhua Shendong Coal Group Corporation Limited, Shenhua Ningxia Coal Industry Group, Shenhua Wanli Coal Industry Co., Ltd., Yankuang Group, Zaoju Group, Zibo Mining Group, Anhui Lianghuai Mining Area, Henan Pingdingshan Coal Group, Shanxi Datong Coal Mine Group and Xishan Coal Electricity Group Co., Ltd. and been universally praised for their top quality.