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1. National Explosion proof Electrical Product Quality Inspection and Testing Center/Nanyang Explosion proof Electrical Research Institute (Nanyang CNEX)
2. National Instrument Explosion proof Safety Supervision and Inspection Station/Shanghai Instrument Automation System Inspection and Testing Institute Co., Ltd. (Shanghai NEPSI)
3. National Explosion proof Product Quality Inspection and Testing Center (Tianjin)/Petroleum and Chemical Industry Electrical Product Explosion proof Quality Supervision and Inspection Center/Tianjin PCEC
4. National Safety Production Beijing Mining Shaft Equipment and Mining Oil Testing and Inspection Center/Coal Science (Beijing) Testing Technology Co., Ltd. (Beijing Coal Science Institute)
5. National Explosion proof Electrical Product Quality Inspection and Testing Center (Jiangsu)/Suzhou Electric Science Research Institute Co., Ltd
6. National Explosion proof Equipment Quality Supervision and Inspection Center (Guangdong)/Guangzhou Special Mechanical and Electrical Equipment Testing and Research Institute (Guangzhou Special Inspection Institute)
7. Mechanical Industry Low Voltage Explosion proof Electrical Product Quality Supervision and Testing Center/Shenyang Electric Transmission (Co., Ltd.) (Shen Chuansuo)
8. National Safety Production Fushun Mining Equipment Testing and Inspection Center/National Coal Mine Explosion proof Safety Product Quality Inspection and Testing Center/Fushun Explosion proof Institute
9. Chongqing Anbiao Testing and Research Institute Co., Ltd./Chongqing Electrical Explosion proof Inspection Station of Coal Industry (Chongqing Coal Science Institute)
10. National Quality Supervision and Inspection Center for Low Voltage Explosion proof Electrical Appliances (Liaoning)
11. National Safety Production Changsha Mining Electromechanical Testing and Inspection Center/National Nonferrous Metallurgical Electromechanical Product Quality Supervision and Inspection Center
12. Changzhou Communication Monitoring Product Quality Supervision and Inspection Center for Coal Industry/National Safety Production Changzhou Mining Communication Monitoring Equipment Testing and Inspection Center
13. Mechanical Industry Explosion proof Electrical Equipment Quality Supervision and Inspection Center/Jiamusi Explosion proof Motor Research Institute
14. Fangyuan Radio and Television Inspection and Testing Co., Ltd
15. China Quality Certification Center South China Laboratory16. Zhejiang Electromechanical Product Quality Testing Institute Co., Ltd17. Zhejiang Fangyuan Electrical Equipment Testing Co., Ltd
