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China Industry (Ningbo) Co.,Ltd
Puyang Zhongshi Group Co., Ltd.
Jianhu Jielin Petrochemical Machinery Co., Ltd.
Beijing Superior Drilling Equipment Co., Ltd.
Jiangyin Shuangma Heavy Industry Equipment Co., Ltd.
Shaanxi Aipu Machinery Manufacture Co., Ltd.
Shenyang New Densen Casting and Forging Co., Ltd.
Cangzhou Lockheed Petroleum Machinery Co., Ltd.
Ji Ning Hengwang Mining Machinery Co., Ltd.
Nanchang Bestway Cemented Carbide Co., Ltd.