DIN EN 60335-2-83-2009 家用和类似用途电器.安全性.第2-83部分:屋顶排水用加热集水沟的特殊要求
Household and similar electrical appliances - Safety - Part 2-83: Particular requirements for heated gullies for roof drainage (IEC 60335-2-83:2001 + A1:2008); German version EN 60335-2-83:2002 + A1:2008