NF S31-014-3-1997
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:嵌入式阀门和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 3 : mounting and operating conditions for in-line valves and appliances.