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Beijing Sanki Petroleum Technology Co., Ltd.
Hebei Lifu Pipeline Tech Co., Ltd.
Guangzhou Yoko Electron Co., Ltd.
Senpai Machinery Co., Ltd.
Wenzhou Bluesky Energy Technology Co., Ltd.
Shenyang Aerospace Xinyang Mechanical and Electrical Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.
Hangzhou ChengYingYi Energy Technology Co., Ltd.
Dinggin Hardware (Dalian) Co., Ltd.
Shandong Helloo Trailer Co., Ltd.