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| Author | AENOR |
|---|---|
| Editor | AENOR |
| Document type | Standard |
| Format | File |
| ICS | 29.240.20 : Power transmission and distribution lines |
| Number of pages | 16 |
| Replace | UNE 21021:1960,UNE 21021:1980 |
| Year | 1980 |
| Document history | UNE 21021:1960,UNE 21021:1980 |
| Country | Spain |