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Rudolf Walther

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Polytechnical dictionary,
Polytechnical Dictionary
Dictionary of technology
Tehcnik und Angewandte Wissenschaften Polytechnical Dictionary, Vol. 1, English-German
Polytechnical Dictionary
Wörterbuch der Technik: Deutsch-englisch
Polytechnical Dictionary German-English
German-English
English-German Polytechnical Dictionary Polytechnisches Woerterbuch
Technical Dictionary of Production Engineering: English-German