Home / Standards / GB/T 27698.4 GB/T 27698.4 Active Test method for performance of heat exchangers and heat transfer elements — Part 4: Noise measurement for air coolers 热交换器及传热元件性能测试方法 第4部分:空冷器噪声测定 Standard Type GBT ICS 27.060.30 CCS J75 Status 现行 Issue Date 2024-09-02 Implementation 2023-05-23 Responsible Dept N/A Drafting Unit N/A