IS:2713 (PART 1 to 3) - 1980 (Reaffirmed 1987); Specification for tubular steel poles for overhead power lines
IS:2713 (PART 1 to 3) - 1980 (Reaffirmed 1987); Specification for tubular steel poles for overhead power lines
- NEW DELHI BIS 1980
- 30p
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