IS : 4249 - 1967 Classification and methods of tests for non-ignitable and self-extinguishing properties of solid electrical insulating materials
Bureau of Indian Standards
IS : 4249 - 1967 Classification and methods of tests for non-ignitable and self-extinguishing properties of solid electrical insulating materials - New Delhi Bureau of Indian Standards 1967 - 22
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IS : 4249 - 1967 Classification and methods of tests for non-ignitable and self-extinguishing properties of solid electrical insulating materials - New Delhi Bureau of Indian Standards 1967 - 22
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