DIN EN 60335-2-52-2009 家用和类似用途电器.安全性.第2-52部分:口腔保健器具的特殊要求
Household and similar electrical appliances - Safety - Part 2-52: Particular requirements for oral hygiene appliances (IEC 60335-2-52:2002 + A1:2008); German version EN 60335-2-52:2003 + A1:2008