As follows:
A, the larger enterprises: Yingda Industrial (Shanghai) Co., Ltd., Wuxi Electric Furnace Co., Ltd., Suzhou Zhenwu Electric Furnace Co., Ltd., Xi'an Electric Furnace Research Institute Co.
The second medium-sized furnace enterprises: (90) Beijing Institute of Electrical and Mechanical Research Beijing Electric Furnace Factory Beijing Aerospace Shenyang Shenwu Industrial Furnace Co. Ltd. Tianjin Tiangao Induction Heating Co. Beijing Shenwu Thermal Energy Technology Co. Shenyang City Industrial Electric Furnace Factory Shenyang City Great Wall Industrial Electric Furnace Factory Shenyang Modern Industrial Furnace Manufacturing Co. Shenyang City Electric Furnace Factory Shenyang Energy Saving Industrial Electric Furnace Factory Shenyang Changbai Electric Furnace Factory Shenyang Hengjin Vacuum Technology Co. Furnace Branch Benxi Xinyu Electronic Equipment Co. Dalian Songliao Electronics Co. Dalian Changrong Furnace Industry Co. Jinzhou Electric Furnace Co. Ltd. Baoding City Sanfeng Electric Appliance Co. Baoding City Dongfang Rectifier Transformer Co. Baoding City Hengli High Frequency Equipment Factory Baoding City Red Star High Frequency Equipment Co. Ltd. Nanjing Electric Furnace Factory Nanjing Xinguangying Furnace Industry Co. Nanjing Changjiang Electric Furnace Co. Danyang West Rectifier Co. Changzhou Shengmao Furnace Manufacturing Co. Changzhou Keyu Electronics Co. Wuxi Sifang Equipment Manufacturing Co. Wuxi Xinqiujing Steel Co. Ltd. Suzhou Industrial Park Heat Treatment Equipment Factory Ltd. Suzhou Wusong Electric Furnace Factory Nanchang Electric Furnace Factory Jiangxi Electric Furnace Factory Shandong Rongtai Electric Furnace Manufacturing Co. Ltd. Ningbo Dongfang Heating Equipment Co. Fenghua Bright Heat Treatment Furnace Co. Chongqing Electric Furnace Co. Chongqing Chuan Yi General Factory Co. Saidi Industrial Furnace Co. Xiangtan Rixin Electric Heating Equipment Co. Xiangtan Xiangji Electric Furnace Factory Zhuzhou Electric Furnace Factory Zhuzhou Torch Industrial Furnace Co. Shaanxi Sanqin Industrial Furnace Co. Xi'an Haidexin Electric Furnace Co. Xi'an Bodai Electric Furnace Co. Xi'an Hanzhong Anzhong Machinery Co. Xi'an Chenghang Electromechanical Equipment Factory Xi'an Yunhan High-temperature Furnace Co. Xi'an Dynamic Chemical Industry Co.