KS C IEC 60811-1-4-2020 Common test methods for insulating and sheathing materials of electric cables — Part 1: Methods for general application —Section 4: Tests at low temperature
2020KS C IEC 60811-1-4:2020 Common test methods for insulating and sheathing materials of electric cables — Part 1: Methods for general application —Section 4: Tests at low temperature
2002KS C IEC 60811-1-4:2002 Common test methods for insulating and sheathing materials of electric cables-Part 1:Methods for general application-Section 4:Test at low temperature