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Hangzhou ChengYingYi Energy Technology Co., Ltd.
Shenyang Aerospace Xinyang Mechanical and Electrical Co., Ltd.
Senpai Machinery Co., Ltd.
Wenzhou Bluesky Energy Technology Co., Ltd.
Yongjia Aocheng Hardware Co., Ltd.
Dongxing Lianyou Import & Export Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.
Beijing Sanki Petroleum Technology Co., Ltd.
Sichuan Mayflower Precision Machinery Co., Ltd.