- Shandong Weima Pumps Manufacturing Co., Ltd
- Sucker rod pump, Oil lifting equipment, Sucker rod pump parts, Sucker rod pump, Rodless complete oil production system
Shandong
- Jiyuan City East Heavy Industry Co., Ltd.
- Petroleum drilling tools
Henan
- Nantong Percent Precision Manufacturing Co., Ltd
- Petroleum Drilling Tools; Handling and Wellhead Tools
Jiangsu