NF S31-014-4*NF EN ISO 3822-4:1997
声学 供水设施使用的器械和设备发出噪音的试验室试验 第3部分:专用器械的安装和操作条件
Acoustics. Laboratory tests on noise emission from appliances and equipment used in water supply installations. Part 4 : mounting and operating conditions for special appliances.