2017KS C IEC 60335-2-81:2017 Household and similar electrical appliances —Safety — Part 2-81: Particular requirements for foot warmers and heating mats
2014KS C IEC 60335-2-81:2014 Household and similar electrical appliances —Safety — Part 2-81: Particular requirements for foot warmers and heating mats
2002KS C IEC 60335-2-81:2002 Safety of household and similar electrical appliances-Part 2:Particular requirements for foot warmers and heating mats