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Ebook The Boy's Book of New Inventions
- Editore:
Forgotten Books
- EAN:
9780243768103
- Formato:
- Protezione:
- Nessuna
- Dimensione:
- 51.96 Mb
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Descrizione Ebook The Boy's Book of New Inventions
Although the subjects treated in the earlier chapters are here spoken of as new inventions, all of them are not recent in the strictest sense of the word, for men had been working on the central idea of some of them for many years before they actually were developed to a stage where they could be patented and sent out into the world.
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