KS C IEC 60621-1-2014 Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries)-Part 1:Scope and definitions
2014KS C IEC 60621-1:2014 Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries)-Part 1:Scope and definitions
0000 KS C IEC 60621-1-2005(2010)
2005KS C IEC 60621-1:2005 Electrical installations for outdoor sites under heavy conditions (including open-cast mines and quarries)-Part 1:Scope and definitions