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Zhejiang Qianxilong Special Fibre Co.,Ltd
Hangzhou Zhutai Trading Co.,Ltd
Jianhu Jielin Petrochemical Machinery Co., Ltd.
Beijing Superior Drilling Equipment Co., Ltd.
Cangzhou Lockheed Petroleum Machinery Co., Ltd.
Ji Ning Hengwang Mining Machinery Co., Ltd.
Jiangyin Shuangma Heavy Industry Equipment Co., Ltd.
Shenyang New Densen Casting and Forging Co., Ltd.
Shaanxi Aipu Machinery Manufacture Co., Ltd.