DIN EN ISO 3822-4:1997-03
声学 - 供水装置中使用的器具和设备噪声排放的实验室测试 - 第 4 部分:特殊器具的安装和操作条件(ISO 3822-4:1997)
Acoustics - Laboratory tests on noise emission from appliances and equipment used in water supply installations - Part 4: Mounting and operating conditions for special appliances (ISO 3822-4:1997); German version EN ISO 3822-4:1997