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Puyang Zhongshi Group Co., Ltd.
JOC Machinery Company Limited
Zibo Qingdong Machinery Manufacturing Co., Ltd.
Tianjin Dalai International Trading Co., Ltd.
Guangzhou Morgan Seals Co., Ltd.
Jianhu Jielin Petrochemical Machinery Co., Ltd.
Beijing Superior Drilling Equipment Co., Ltd.
Shandong China Coal Industrial & Mining Supplies Group Co., Ltd.