All water defector products are tested through national air conditioning apparatus testing center. 所有档水器产品均通过国家空调设备检测中心检测。
The paper analyzed the main electric equipment of HVAC ( Heating, Ventilation and Air Conditioning) apparatus and introduced structural principle of the auxiliary power system for EMUs. 分析了动车组空调装置的主要用电设备,并对辅助供电系统的结构原理进行了介绍。