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Puyang Zhongshi Group Co., Ltd.
Shaanxi Aipu Machinery Manufacture Co., Ltd.
Beijing Superior Drilling Equipment Co., Ltd.
Jianhu Jielin Petrochemical Machinery Co., Ltd.
Nanchang Bestway Cemented Carbide Co., Ltd.
Zibo Qingdong Machinery Manufacturing Co., Ltd.
Ji Ning Hengwang Mining Machinery Co., Ltd.