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Senpai Machinery Co., Ltd.
Wenzhou Bluesky Energy Technology Co., Ltd.
Hebei Lifu Pipeline Tech Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.
Hangzhou ChengYingYi Energy Technology Co., Ltd.
Sichuan Mayflower Precision Machinery Co., Ltd.
Yongjia Aocheng Hardware Co., Ltd.
SICHUAN NEW TIANYUAN TECHNOLOGIES CO., LTD.
Beijing Sanki Petroleum Technology Co., Ltd.
Guangzhou Yoko Electron Co., Ltd.
Shenyang Aerospace Xinyang Mechanical and Electrical Co., Ltd.