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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 Prevention 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 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 Electrical Science Research Institute Co., Ltd
6. National Quality Supervision and Inspection Center for Explosion proof Equipment (Guangdong)/Guangzhou Special Mechanical and Electrical Equipment Testing and Research Institute (Guangzhou Special Inspection Institute)
7. Quality Supervision and Testing Center for Low Voltage Explosion proof Electrical Appliances in the Mechanical Industry/Shenyang Electric Transmission (Co., Ltd.) (Shenyang Transmission Institute)
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 Safety Standard Testing and Research Institute Co., Ltd./Chongqing Electrical Explosion Prevention 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/Changzhou Mining Communication Monitoring Equipment Testing and Inspection Center for National Safety Production
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. National Electrical Safety and Quality Inspection and Testing Center (Zhejiang)/Zhejiang Fangyuan Electrical Equipment Testing Co., Ltd
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