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