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| Utgitt
| Westminster, S.W. : W.G. Armstrong, Whitworth & Co. , [1921]
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| Omfang
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| Opplysninger
| "NB: The water turbines described in this reprint were manufactured by Messrs. Jensen & Dahl, Kristiania, Norway, to whose designs turbines are now being manufactured at Messrs. W.G. Armstrong, Whitworth & Co.'s works at Elswick
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