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Hangzhou ChengYingYi Energy Technology Co., Ltd.
Senpai Machinery Co., Ltd.
Wenzhou Changlong Fuel Dispenser Manufacture Co., Ltd.
Hebei Lifu Pipeline Tech Co., Ltd.
Beijing Sanki Petroleum Technology Co., Ltd.
Wenzhou Bluesky Energy Technology Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.