| Original language | English |
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| Number of pages | 136 |
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| Publication status | Published - 1979 |
| Series | Publication / Electric Power Engineering Department, Technical University of Denmark |
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| Number | 7902 |
Bibliographical note
Acknowledgments:LK-NES, LK-NES Foundation, Thomas B.Thrige Foundation, Selmer Trane Foundation, and prof. Hyldgaard-Jensen Foundation