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| 008 | 180131b1948 xxu||||| |||| 00| 0 eng d | ||
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_a _b |
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| 245 | _aEra-Z/T69 - 1948; High Voltage D.C. Transmission Part Ii - Critical Review Of The Question Of D.C. O | ||
| 260 |
_a _bERATechnology Ltd _c1948 |
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| 999 |
_c64565 _d64565 |
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