| Shandong Zhongtan Intelligent Equipment Co., Ltd | 2022-03-01 | Wellhead Heating Device, Large-Scale Equipment, Steel Products | 10000K CNY | مدعوم |
| Shandong Huayu Heavy Industry Machinery Co., Ltd | 2020-12-17 | Wellhead Heating Device, Rescue And Rescue, Explosion-Proof Electrical Equipment | 5000K CNY | غير مدعوم |
| Jiangsu Zhongren Machinery Equipment Co., Ltd | 2015-09-09 | Wellhead Heating Device, Duct Heater, Fin Heating Tube | 20000K CNY | غير مدعوم |
| Jiangsu Ruiyuan Heating Equipment Technology Co., Ltd | 2008-08-08 | Wellhead Heating Device, Vacuum Cleaning Furnace, Biphenyl Furnace | 50000K CNY | غير مدعوم |
| Shenyang Lincheng Electric Technology Co., Ltd | 2017-01-18 | Wellhead Heating Device, Explosion Proof Electromagnetic Hot Air Stove, Reactor Electromagnetic Heating Equipment | 20000K CNY | غير مدعوم |
| Shandong Zhongzhong Intelligent Technology Co., Ltd | 2022-03-10 | Wellhead Heating Device, Steel Products, Architecture | 10000K CNY | غير مدعوم |
| Shandong Huakuang High tech Development Co., Ltd | 2024-02-29 | Wellhead Heating Device, Lifting Equipment, Steel Products | 3000K CNY | مدعوم |
| Jiangsu Hebang Machinery Equipment Co., Ltd | 2017-04-01 | Wellhead Heating Device, Tunnel Oven, Heating Tube | 18000K CNY | غير مدعوم |
| Jiangsu Anhongzhi Ruiye Technology Co., Ltd | 2018-09-26 | Wellhead Heating Device, Heating Tube, Pipeline Heater | 28000K CNY | غير مدعوم |
| Jiangsu Yanyan Machinery Equipment Co., Ltd | 2020-06-09 | Wellhead Heating Device, Thermal Oil Heater, Pipeline Heater | 10000K CNY | غير مدعوم |