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Zhengzhou Shuliy Machinery Co., Ltd
Cangzhou Lockheed Petroleum Machinery Co., Ltd.
Shenyang New Densen Casting and Forging Co., Ltd.
Beijing Superior Drilling Equipment Co., Ltd.
Ji Ning Hengwang Mining Machinery Co., Ltd.
Jiangyin Shuangma Heavy Industry Equipment Co., Ltd.
Jianhu Jielin Petrochemical Machinery Co., Ltd.
Shaanxi Aipu Machinery Manufacture Co., Ltd.