George Harrington's first clockwork dental drill in a silver plated veneered box. Invented in 1864,it had interchangeable drill heads and was operated by a spring-wound mechanism wound with a key | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / British Dental Association Museum |
Bildgröße: | 3796 px × 2321 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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