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Dinggin Hardware (Dalian) Co., Ltd.
Wenzhou Bluesky Energy Technology Co., Ltd.
Senpai Machinery Co., Ltd.
Hangzhou ChengYingYi Energy Technology Co., Ltd.
Sichuan Mayflower Precision Machinery Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.
Dongxing Lianyou Import & Export Co., Ltd.
Shenyang Aerospace Xinyang Mechanical and Electrical Co., Ltd.
Beijing Sanki Petroleum Technology Co., Ltd.
CLW Heavy Industry Co., Ltd.