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Dinggin Hardware (Dalian) Co., Ltd.
Beijing Sanki Petroleum Technology Co., Ltd.
CLW Heavy Industry Co., Ltd.
Wenzhou Bluesky Energy Technology Co., Ltd.
Hangzhou ChengYingYi Energy Technology Co., Ltd.
Sichuan Mayflower Precision Machinery Co., Ltd.
Senpai Machinery Co., Ltd.
Dongxing Lianyou Import & Export Co., Ltd.