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Title: Hamann Elma electric calculating machine made by DeTeWe, Ber [Go to resource]
Description: Hamann Elma electric calculating machine made by DeTeWe, Berlin License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: calculating machine (lever wheel) Source: Science Museum Creator: Deutsche Telephon werke Identifier: 1990-696 Go to resource More Like this...
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