IS:09431 - 1979; Specification for indoor post insulators of organic materiual for sustmes with nominal voltages greater than 1 000 V up to and including 300 kV
IS:09431 - 1979; Specification for indoor post insulators of organic materiual for sustmes with nominal voltages greater than 1 000 V up to and including 300 kV
- New Delhi BIS 1980
- 26p
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