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Wenzhou Bluesky Energy Technology Co., Ltd.
Senpai Machinery Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.
Hebei Lifu Pipeline Tech Co., Ltd.
Guangzhou Yoko Electron Co., Ltd.
SICHUAN NEW TIANYUAN TECHNOLOGIES CO., LTD.
Beijing Sanki Petroleum Technology Co., Ltd.
Dinggin Hardware (Dalian) Co., Ltd.
Sichuan Mayflower Precision Machinery Co., Ltd.