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