BS-2689 - 1956 (with amendment no.1 - 1960); Recommended methods for estimating the effect of deleterious substances in fibrous electrical insulating materials
BS-2689 - 1956 (with amendment no.1 - 1960); Recommended methods for estimating the effect of deleterious substances in fibrous electrical insulating materials
- London BSI 1956
- 25+4p
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