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Senpai Machinery Co., Ltd.
Wenzhou Bluesky Energy Technology Co., Ltd.
Dinggin Hardware (Dalian) Co., Ltd.
Hangzhou ChengYingYi Energy Technology Co., Ltd.
SICHUAN NEW TIANYUAN TECHNOLOGIES CO., LTD.
Guangzhou Yoko Electron Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.
Beijing Sanki Petroleum Technology Co., Ltd.