As follows:

1. Larger enterprises: Ying Da Industry (Shanghai) Co., Ltd., Wuxi Electric Furnace Co., Ltd., Suzhou Zhenwu Electric Furnace Co., Ltd., xi 'an Electric Furnace Research Institute Co., Ltd.

Second, medium-sized electric furnace enterprises: (90) Beijing Institute of Electromechanical Research Beijing Electric Furnace Factory Beijing Aerospace Shen Jian Industrial Furnace Co., Ltd. Tianjin Saiyang Industrial Furnace Co., Ltd. Tianjin Gaotian Induction Heating Co., Ltd. Beijing Shenwu Thermal Energy Technology Co., Ltd. Shenyang Industrial Electric Furnace Factory Shenyang Great Wall Industrial Electric Furnace Factory Shenyang Modern Industrial Furnace Manufacturing Co., Ltd. Shenyang Electric Furnace Factory Shenyang Energy Saving Industrial Electric Furnace Factory Shenyang Changbai Electric Furnace Factory Shenyang Hengjin Vacuum Technology Co., Ltd. Ltd. Liaoning Zhenlong Vacuum Equipment Co., Ltd. Division Shenyang Vacuum Technology Research Institute Liaoyang Hongtu Cemented Carbide Co., Ltd. Kiln Branch Benxi Xinyu Electronic Equipment Co., Ltd. Dalian Songliao Electronics Co., Ltd. Dalian Chang Rong Furnace Co., Ltd. Jinzhou Xinghang Vacuum Equipment Co., Ltd. Liaoning Power Electronics Group Liaoning Electronic Equipment Factory Changchun Xinghai Electric Furnace Co., Ltd. Harbin Yongchang Electric Furnace Factory Hebei Jingxian Haidong Electric Furnace Factory Shijiazhuang Xinhua Industrial Furnace Co., Ltd. Division, Co., Ltd. wuqiao county Hengyuan Electromechanical Equipment Factory Baoding Sanfeng Electric Appliance Co., Ltd. Baoding Dongfang Rectifier Transformer Co., Ltd. Baoding Hengli High Frequency Equipment Factory Baoding Hongxing High Frequency Equipment Co., Ltd. Baoding Xinhe High Frequency Equipment Co., Ltd. Shanghai Electric (Group) Company Experimental Electric Furnace Factory Shanghai Automation Instrument Co., Ltd. Yipusheng Industrial Furnace (Shanghai) Co., Ltd. Yifudi Induction Equipment (Shanghai) Ltd. Nanjing Electric Furnace Factory Nanjing Xinguangying Furnace Industry Co., Ltd. Nanjing Yangtze River Electric Furnace Co., Ltd., Danyang Wester Rectifier Co., Ltd. Changzhou Sheng Mao Furnace Manufacturing Co., Ltd. Changzhou Keyu Electronics Co., Ltd. Wuxi Sifang Equipment Manufacturing Co., Ltd. Wuxi New Refined Steel Co., Ltd. Wuxi Heat Treatment Equipment Factory Yixing Wanhua Transformer Factory Jiangsu Jingjiang Ma Wanli Power Machinery No.1 Factory Suzhou Xinchang Light Energy Technology Co., Ltd. Suzhou Industrial Park Heat Treatment Equipment Factory Co., Ltd. Suzhou Wusong Electric Furnace Factory Nanchang Electric Furnace Factory Jiangxi Electric Furnace Factory Shandong Rong Tai Electric Furnace Manufacturing Co., Ltd. Zibo Electric Furnace Factory Qingdao Dong Hao Electric Furnace Manufacturing Co., Ltd. Hangzhou Sida Electric Furnace Complete Equipment Co., Ltd. Zhejiang Lin 'an Electronic Equipment Co., Ltd. Changxing County Haoda Industrial Furnace Co., Ltd. Changxing Huaxing High Temperature Electric Furnace Co., Ltd. Changxing Zheng Da Electric Furnace Co., Ltd. Ningbo Dongfang Heating Equipment Co., Ltd. Fenghua Guangming Heat Treatment Electric Furnace Co., Ltd. Chongqing Electric Furnace Co., Ltd. Chongqing Chuanyi General Factory Co., Ltd. Saidi Industrial Furnace Co., Ltd. Xiangtan Rixin Electric Heating Equipment Co., Ltd. Xiangtan Season. Xiang Electric Furnace Factory Zhuzhou Torch Industrial Furnace Co., Ltd. Foshan Zhao Ke Industrial Furnace Co., Ltd. Chengdu Mike Electronic Industry Co., Ltd. Shaanxi Sanqin Industrial Furnace Co., Ltd. Xi Anhai Dexin Electric Appliance Co., Ltd. Xi Anhangcheng Electromechanical Equipment Factory Xi An Han Yun High Temperature Furnace Co., Ltd. Xi Anhua Neng Electric Furnace Factory Xi An Electromechanical Research Institute Xi An Zhongdian Electric Furnace Co., Ltd. Shaanxi Industrial Electric Furnace Manufacturing Co., Ltd. Xi 'an Huaxing Electric Furnace Co., Ltd.