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Beijing Sanki Petroleum Technology Co., Ltd.
Senpai Machinery Co., Ltd.
Zhejiang Shengxing Petroleum Equipment Co., Ltd.
Yongjia Aocheng Hardware Co., Ltd.
Shenyang Aerospace Xinyang Mechanical and Electrical Co., Ltd.
Dinggin Hardware (Dalian) Co., Ltd.
Wenzhou Bluesky Energy Technology Co., Ltd.
Hangzhou ChengYingYi Energy Technology Co., Ltd.
SICHUAN NEW TIANYUAN TECHNOLOGIES CO., LTD.