KS C IEC 60614-2-1-2012 Specification for conduits for electrical installations-Part 2:Particular specifications for conduits-Section One: Metal conduits
2014KS C IEC 60614-2-1:2014 Specification for conduits for electrical installations-Part 2:Particular specifications for conduits-Section One: Metal conduits
2012KS C IEC 60614-2-1-2012 Specification for conduits for electrical installations-Part 2:Particular specifications for conduits-Section One: Metal conduits