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Beijing Sanki Petroleum Technology Co., Ltd.
Senpai Machinery Co., Ltd.
Wenzhou Changlong Fuel Dispenser Manufacture Co., Ltd.
Hebei Lifu Pipeline Tech Co., Ltd.
Hangzhou ChengYingYi Energy Technology Co., Ltd.
Shenyang Aerospace Xinyang Mechanical and Electrical Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.