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Improvements in or relating to electric controllers

by von Zweigbergk, Thorsten. -- Great Britain Patent Office

Material type: book Book; Literary form: not fiction Publisher: HMSO 1909Availability: Items available for reference: Crosby Library (1 ).

Improvements in or relating to electric controllers for railway service & the like

by von Zweigbergk, Thorsten. -- Great Britain Patent Office

Material type: book Book; Literary form: not fiction Publisher: HMSO 1909Availability: Items available for reference: Crosby Library (1 ).

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