DIN EN 60335-2-51-2009 家用和类似用途电器.安全性.第2-51部分:加热和供水装置用固定式循环泵的特殊要求
Household and similar electrical appliances - Safety - Part 2-51: Particular requirements for stationary circulation pumps for heating and service water installations (IEC 60335-2-51:2002 + A1:2008); German version EN 60335-2-51:2003 + A1:2008